Add demo year-bound story

project/story/demo_stories/year_bound_demo.gd

@@ -0,0 +1,14 @@
+extends SimpleStory
+
+var text := "This story will not be shown during the player's freshman year."
+
+var years := Year.not_in([ Year.Freshman ])
+
+var options := {
+	"This is not my freshman year": {
+		"text": "See? I told you so!",
+	},
+	"This is my freshman year": {
+		"text": "If that's true, something is wrong. You should not be seeing this.",
+	},
+}