SwiftUI Umbrella Framework 3.7.0 Release

- define swift package;
- add Native/Web/Classic units and helpers files;
- set up proper targets and dependencies in the `Package.swift`.

Package.swift

@@ -20,7 +20,7 @@ let package = Package(
         .binaryTarget(
             name: "TaboolaSDK",
             url: "https://taboola-mobile-sdk.s3.us-west-2.amazonaws.com/ios/spm/3.7.0/TaboolaSDK.xcframework.zip",
-            checksum: "3e1c404618758a13e64f998a71802f110eb4b14f08ec3fca67f29b4142b3a2e2"
+            checksum: "093796dbf12cfe5f1e4ef0af470d9b59fe276b9ce5fcb6d44f6f6ed5ff104182"
         )
     ]
 )