Make avatar buildable, and improve examples:

- Surround example code with UNITY_EDITOR condition
- Change assembly definition to depend on VRC
- Improve Example 3: Make it animate a wedge
- Improve ExampleManual Placing States: Add zero argument overload

Examples/GenExample1_ToggleSmr.cs

@@ -1,4 +1,4 @@
-using System.Linq;
+#if UNITY_EDITOR
 using UnityEngine;
 using VRC.SDK3.Avatars.Components;
 using UnityEditor;
@@ -73,4 +73,5 @@ namespace AnimatorAsCodeFramework.Examples
             aac.RemoveAllMainLayers();
         }
     }
-}
+}
+#endif