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/WASDMove.cpp

@@ -49,7 +49,7 @@ namespace {
             }
             const glm::vec3 vel = move * m_Speed;
 
-            if (auto* rb = TryGet<Engine::ECS::RigidBodyComponent>();
+            if (auto* rb = TryGetComponent<Engine::ECS::RigidBodyComponent>();
                 rb != nullptr && rb->bodyValid &&
                 rb->type == Engine::ECS::RigidBodyComponent::BodyType::Dynamic) {
                 // 物理驱动：只覆写水平速度，Y 保留物理积分离散结果