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/GenExampleManual_PlacingStates.cs

@@ -1,4 +1,4 @@
-using System.Linq;
+#if UNITY_EDITOR
 using UnityEngine;
 using VRC.SDK3.Avatars.Components;
 using UnityEditor;
@@ -35,9 +35,10 @@ namespace AnimatorAsCodeFramework.Examples
             var b = fx.NewState("B"); // This will be placed under A.
             var c = fx.NewState("C").RightOf(a); // This will be placed right of A.
             var d = fx.NewState("D"); // This will be placed under C.
+            var e = fx.NewState("E").RightOf(); // This will be placed right of D.
             var alternate = fx.NewState("Alternate").Over(c); // This will be placed over C.
 
-// This will be placed next to Alternate: 2 blocks over, and 1 to the right.
+            // This will be placed relative to Alternate: 2 blocks over, and 1 to the right.
             var reset = fx.NewState("Reset").Shift(alternate, 1, -2);
         }
 
@@ -49,4 +50,5 @@ namespace AnimatorAsCodeFramework.Examples
             aac.RemoveAllMainLayers();
         }
     }
-}
+}
+#endif