fix: implement ResolveReferences for reactive objects (#1019)

Closes: #996

Runtime/AvatarTagComponent.cs

@@ -31,9 +31,10 @@ using VRC.SDKBase;
 
 namespace nadena.dev.modular_avatar.core
 {
-    /**
+    /// <summary>
-     * This abstract base class is injected into the VRCSDK avatar component allowlist to avoid
+    /// This class is used internally by Modular Avatar for common operations between MA components. It should not be
-     */
+    /// inherited by user classes, and will be removed in Modular Avatar 2.0.
+    /// </summary>
     [DefaultExecutionOrder(-9999)] // run before av3emu
     public abstract class AvatarTagComponent : MonoBehaviour, IEditorOnly
     {

Runtime/ReactiveObjects/ModularAvatarMaterialSetter.cs

@@ -39,5 +39,13 @@ namespace nadena.dev.modular_avatar.core
             get => m_objects;
             set => m_objects = value;
         }
+
+        public override void ResolveReferences()
+        {
+            foreach (var obj in m_objects)
+            {
+                obj.Object?.Get(this);
+            }
+        }
     }
 }

Runtime/ReactiveObjects/ModularAvatarObjectToggle.cs

@@ -22,5 +22,13 @@ namespace nadena.dev.modular_avatar.core
             get => m_objects;
             set => m_objects = value;
         }
+        
+        public override void ResolveReferences()
+        {
+            foreach (var obj in m_objects)
+            {
+                obj.Object?.Get(this);
+            }
+        }
     }
 }

Runtime/ReactiveObjects/ModularAvatarShapeChanger.cs

@@ -65,5 +65,10 @@ namespace nadena.dev.modular_avatar.core
             get => m_shapes;
             set => m_shapes = value;
         }
+
+        public override void ResolveReferences()
+        {
+            m_targetRenderer?.Get(this);
+        }
     }
 }