chore(scripts): rename script API to GetComponent/TryGetComponent; misc

Clearer accessor naming on ScriptBehavior (Get -> GetComponent,
TryGet -> TryGetComponent), WASDMove follows. Teleport marked const
(JPH Ref does not propagate constness). Spinner: auto-rotation
disabled for the moment, registration switched from the registration
macro to an explicit lambda to verify the mechanism.

App/scripts/Spinner.cpp

@@ -24,15 +24,24 @@ namespace {
 
         void OnUpdate(float dt) override {
             // 四元数复合绕 Y（避免每帧欧拉↔四元数往返累积失真）
+
+            /*
             const glm::quat step = glm::angleAxis(
                 glm::radians(m_Speed * dt), glm::vec3(0.0f, 1.0f, 0.0f));
             Transform().SetRotationQuat(step * Transform().GetRotationQuat());
+        */
         }
 
     private:
         float m_Speed = 90.0f; // 度/秒
     };
 
-    ENGINE_REGISTER_SCRIPT(Spinner)
+    static const bool s_Spinner_registered = [] {
+        ::Engine::Scripting::ScriptRegistry::Register(
+            "Spinner", []() -> ::Engine::Scope<::Engine::Scripting::ScriptBehavior> {
+                return ::Engine::CreateScope<Spinner>();
+            });
+        return true;
+    }();
 
 } // namespace