Add script runtime lifecycle skeleton

engine/include/XCEngine/Scripting/NullScriptRuntime.h

@@ -0,0 +1,23 @@
+#pragma once
+
+#include <XCEngine/Scripting/IScriptRuntime.h>
+
+namespace XCEngine {
+namespace Scripting {
+
+class NullScriptRuntime : public IScriptRuntime {
+public:
+    void OnRuntimeStart(Components::Scene* scene) override;
+    void OnRuntimeStop(Components::Scene* scene) override;
+
+    bool CreateScriptInstance(const ScriptRuntimeContext& context) override;
+    void DestroyScriptInstance(const ScriptRuntimeContext& context) override;
+
+    void InvokeMethod(
+        const ScriptRuntimeContext& context,
+        ScriptLifecycleMethod method,
+        float deltaTime) override;
+};
+
+} // namespace Scripting
+} // namespace XCEngine