feat(scripting): add field model editing and defaults support

tests/Scene/test_scene_runtime.cpp

@@ -85,6 +85,42 @@ public:
         }
     }
 
+    bool TryGetClassFieldMetadata(
+        const std::string& assemblyName,
+        const std::string& namespaceName,
+        const std::string& className,
+        std::vector<ScriptFieldMetadata>& outFields) const override {
+        (void)assemblyName;
+        (void)namespaceName;
+        (void)className;
+        outFields.clear();
+        return false;
+    }
+
+    bool TrySetManagedFieldValue(
+        const ScriptRuntimeContext& context,
+        const std::string& fieldName,
+        const ScriptFieldValue& value) override {
+        (void)context;
+        (void)fieldName;
+        (void)value;
+        return true;
+    }
+
+    bool TryGetManagedFieldValue(
+        const ScriptRuntimeContext& context,
+        const std::string& fieldName,
+        ScriptFieldValue& outValue) const override {
+        (void)context;
+        (void)fieldName;
+        (void)outValue;
+        return false;
+    }
+
+    void SyncManagedFieldsToStorage(const ScriptRuntimeContext& context) override {
+        (void)context;
+    }
+
     bool CreateScriptInstance(const ScriptRuntimeContext& context) override {
         if (m_events) {
             m_events->push_back("Create:" + Describe(context));