feat(runtime gameobjects): replaced game object overrides with a send message action API

GameObject overrdies were wonky at best and should be replaced with a full blackboard solution to be
properly implemented. The current code to maintain them is also creating quite a mess. For now
they've been replaced with a simple SendMessage API that takes a string to find a GameObject and
support sending over messages. The SetActive hook should handle a majority of use cases.

BREAKING CHANGE: You should remove all references to GameObject overrides, be ready to replace the
game object names with paths (write them down). After upgrading you'll need to swap or remove all
references to game object overrides from your project.

Author: ashblue

Assets/Examples/BasicConversation/BasicConversation.unity

@@ -13,7 +13,7 @@ OcclusionCullingSettings:
 --- !u!104 &2
 RenderSettings:
   m_ObjectHideFlags: 0
-  serializedVersion: 9
+  serializedVersion: 10
   m_Fog: 0
   m_FogColor: {r: 0.5, g: 0.5, b: 0.5, a: 1}
   m_FogMode: 3
@@ -38,13 +38,12 @@ RenderSettings:
   m_ReflectionIntensity: 1
   m_CustomReflection: {fileID: 0}
   m_Sun: {fileID: 705507994}
-  m_IndirectSpecularColor: {r: 0.44657898, g: 0.4964133, b: 0.5748178, a: 1}
+  m_IndirectSpecularColor: {r: 0, g: 0, b: 0, a: 1}
   m_UseRadianceAmbientProbe: 0
 --- !u!157 &3
 LightmapSettings:
   m_ObjectHideFlags: 0
   serializedVersion: 12
-  m_GIWorkflowMode: 0
   m_GISettings:
     serializedVersion: 2
     m_BounceScale: 1
@@ -67,9 +66,6 @@ LightmapSettings:
     m_LightmapParameters: {fileID: 0}
     m_LightmapsBakeMode: 1
     m_TextureCompression: 1
-    m_FinalGather: 0
-    m_FinalGatherFiltering: 1
-    m_FinalGatherRayCount: 256
     m_ReflectionCompression: 2
     m_MixedBakeMode: 2
     m_BakeBackend: 1
@@ -105,7 +101,7 @@ NavMeshSettings:
   serializedVersion: 2
   m_ObjectHideFlags: 0
   m_BuildSettings:
-    serializedVersion: 2
+    serializedVersion: 3
     agentTypeID: 0
     agentRadius: 0.5
     agentHeight: 2
@@ -118,7 +114,7 @@ NavMeshSettings:
     cellSize: 0.16666667
     manualTileSize: 0
     tileSize: 256
-    accuratePlacement: 0
+    buildHeightMesh: 0
     maxJobWorkers: 0
     preserveTilesOutsideBounds: 0
     debug:
@@ -154,7 +150,6 @@ RectTransform:
   m_ConstrainProportionsScale: 0
   m_Children: []
   m_Father: {fileID: 1854390184}
-  m_RootOrder: 1
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
   m_AnchorMin: {x: 0, y: 0}
   m_AnchorMax: {x: 0, y: 0}
@@ -218,7 +213,6 @@ RectTransform:
   m_ConstrainProportionsScale: 0
   m_Children: []
   m_Father: {fileID: 1987331376}
-  m_RootOrder: 1
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
   m_AnchorMin: {x: 0, y: 1}
   m_AnchorMax: {x: 0, y: 1}
@@ -289,9 +283,8 @@ Light:
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 705507993}
   m_Enabled: 1
-  serializedVersion: 10
+  serializedVersion: 11
   m_Type: 1
-  m_Shape: 0
   m_Color: {r: 1, g: 0.95686275, b: 0.8392157, a: 1}
   m_Intensity: 1
   m_Range: 10
@@ -350,13 +343,13 @@ Transform:
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 705507993}
+  serializedVersion: 2
   m_LocalRotation: {x: 0.40821788, y: -0.23456968, z: 0.10938163, w: 0.8754261}
   m_LocalPosition: {x: 0, y: 3, z: 0}
   m_LocalScale: {x: 1, y: 1, z: 1}
   m_ConstrainProportionsScale: 0
   m_Children: []
   m_Father: {fileID: 0}
-  m_RootOrder: 4
   m_LocalEulerAnglesHint: {x: 50, y: -30, z: 0}
 --- !u!82 &705507996
 AudioSource:
@@ -369,6 +362,7 @@ AudioSource:
   serializedVersion: 4
   OutputAudioMixerGroup: {fileID: 0}
   m_audioClip: {fileID: 8300000, guid: 68d5592cda1d5bd429da0481390f1a6a, type: 3}
+  m_Resource: {fileID: 8300000, guid: 68d5592cda1d5bd429da0481390f1a6a, type: 3}
   m_PlayOnAwake: 1
   m_Volume: 1
   m_Pitch: 1
@@ -454,6 +448,37 @@ AudioSource:
     m_PreInfinity: 2
     m_PostInfinity: 2
     m_RotationOrder: 4
+--- !u!1 &894268022
+GameObject:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  serializedVersion: 6
+  m_Component:
+  - component: {fileID: 894268023}
+  m_Layer: 0
+  m_Name: SetActiveTest
+  m_TagString: Untagged
+  m_Icon: {fileID: 0}
+  m_NavMeshLayer: 0
+  m_StaticEditorFlags: 0
+  m_IsActive: 0
+--- !u!4 &894268023
+Transform:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 894268022}
+  serializedVersion: 2
+  m_LocalRotation: {x: 0, y: 0, z: 0, w: 1}
+  m_LocalPosition: {x: 0, y: 0, z: 0}
+  m_LocalScale: {x: 1, y: 1, z: 1}
+  m_ConstrainProportionsScale: 0
+  m_Children: []
+  m_Father: {fileID: 0}
+  m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
 --- !u!1 &963194225
 GameObject:
   m_ObjectHideFlags: 0
@@ -494,9 +519,17 @@ Camera:
   m_projectionMatrixMode: 1
   m_GateFitMode: 2
   m_FOVAxisMode: 0
+  m_Iso: 200
+  m_ShutterSpeed: 0.005
+  m_Aperture: 16
+  m_FocusDistance: 10
+  m_FocalLength: 50
+  m_BladeCount: 5
+  m_Curvature: {x: 2, y: 11}
+  m_BarrelClipping: 0.25
+  m_Anamorphism: 0
   m_SensorSize: {x: 36, y: 24}
   m_LensShift: {x: 0, y: 0}
-  m_FocalLength: 50
   m_NormalizedViewPortRect:
     serializedVersion: 2
     x: 0
@@ -530,13 +563,13 @@ Transform:
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 963194225}
+  serializedVersion: 2
   m_LocalRotation: {x: 0, y: 0, z: 0, w: 1}
   m_LocalPosition: {x: 0, y: 1, z: -10}
   m_LocalScale: {x: 1, y: 1, z: 1}
   m_ConstrainProportionsScale: 0
   m_Children: []
   m_Father: {fileID: 0}
-  m_RootOrder: 3
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
 --- !u!1 &991365858
 GameObject:
@@ -569,7 +602,6 @@ RectTransform:
   m_ConstrainProportionsScale: 0
   m_Children: []
   m_Father: {fileID: 1987331376}
-  m_RootOrder: 0
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
   m_AnchorMin: {x: 0, y: 1}
   m_AnchorMax: {x: 0, y: 1}
@@ -694,6 +726,7 @@ Canvas:
   m_OverrideSorting: 0
   m_OverridePixelPerfect: 0
   m_SortingBucketNormalizedSize: 0
+  m_VertexColorAlwaysGammaSpace: 0
   m_AdditionalShaderChannelsFlag: 0
   m_UpdateRectTransformForStandalone: 0
   m_SortingLayerID: 0
@@ -715,7 +748,6 @@ RectTransform:
   - {fileID: 1854390184}
   - {fileID: 1217128673}
   m_Father: {fileID: 0}
-  m_RootOrder: 1
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
   m_AnchorMin: {x: 0, y: 0}
   m_AnchorMax: {x: 0, y: 0}
@@ -739,7 +771,7 @@ GameObject:
   m_Icon: {fileID: 0}
   m_NavMeshLayer: 0
   m_StaticEditorFlags: 0
-  m_IsActive: 1
+  m_IsActive: 0
 --- !u!224 &1217128673
 RectTransform:
   m_ObjectHideFlags: 0
@@ -753,7 +785,6 @@ RectTransform:
   m_ConstrainProportionsScale: 0
   m_Children: []
   m_Father: {fileID: 1037096126}
-  m_RootOrder: 2
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
   m_AnchorMin: {x: 0.5, y: 0.5}
   m_AnchorMax: {x: 0.5, y: 0.5}
@@ -828,6 +859,7 @@ MonoBehaviour:
   m_Script: {fileID: 11500000, guid: 4f231c4fb786f3946a6b90b886c48677, type: 3}
   m_Name: 
   m_EditorClassIdentifier: 
+  m_SendPointerHoverToParent: 1
   m_HorizontalAxis: Horizontal
   m_VerticalAxis: Vertical
   m_SubmitButton: Submit
@@ -857,13 +889,13 @@ Transform:
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 1578604058}
+  serializedVersion: 2
   m_LocalRotation: {x: 0, y: 0, z: 0, w: 1}
   m_LocalPosition: {x: 0, y: 0, z: 0}
   m_LocalScale: {x: 1, y: 1, z: 1}
   m_ConstrainProportionsScale: 0
   m_Children: []
   m_Father: {fileID: 0}
-  m_RootOrder: 2
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
 --- !u!1 &1854390183
 GameObject:
@@ -896,7 +928,6 @@ RectTransform:
   - {fileID: 1987331376}
   - {fileID: 8172351}
   m_Father: {fileID: 1037096126}
-  m_RootOrder: 1
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
   m_AnchorMin: {x: 0, y: 0}
   m_AnchorMax: {x: 1, y: 1}
@@ -933,9 +964,6 @@ MonoBehaviour:
   m_Name: 
   m_EditorClassIdentifier: 
   dialogue: {fileID: 11400000, guid: 9ee08f7122b445246ba6e627bb67b59a, type: 2}
-  gameObjectOverrides:
-  - _variable: {fileID: 11400000, guid: 9f63ecc07e0124045b2c27d0dfb67d38, type: 2}
-    _gameObject: {fileID: 1217128672}
   speakerContainer: {fileID: 1854390183}
   portrait: {fileID: 62754277}
   lines: {fileID: 991365860}
@@ -949,13 +977,13 @@ Transform:
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 1965669758}
+  serializedVersion: 2
   m_LocalRotation: {x: 0, y: 0, z: 0, w: 1}
   m_LocalPosition: {x: 0, y: 0, z: 0}
   m_LocalScale: {x: 1, y: 1, z: 1}
   m_ConstrainProportionsScale: 0
   m_Children: []
   m_Father: {fileID: 0}
-  m_RootOrder: 0
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
 --- !u!1 &1987331375
 GameObject:
@@ -990,7 +1018,6 @@ RectTransform:
   - {fileID: 991365859}
   - {fileID: 62754276}
   m_Father: {fileID: 1854390184}
-  m_RootOrder: 0
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
   m_AnchorMin: {x: 0, y: 0}
   m_AnchorMax: {x: 0, y: 0}
@@ -1066,7 +1093,6 @@ RectTransform:
   m_ConstrainProportionsScale: 0
   m_Children: []
   m_Father: {fileID: 1037096126}
-  m_RootOrder: 0
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
   m_AnchorMin: {x: 0, y: 0}
   m_AnchorMax: {x: 1, y: 1}
@@ -1111,3 +1137,13 @@ CanvasRenderer:
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 2077554726}
   m_CullTransparentMesh: 0
+--- !u!1660057539 &9223372036854775807
+SceneRoots:
+  m_ObjectHideFlags: 0
+  m_Roots:
+  - {fileID: 1965669760}
+  - {fileID: 1037096126}
+  - {fileID: 1578604061}
+  - {fileID: 963194228}
+  - {fileID: 705507995}
+  - {fileID: 894268023}