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.

Engine/src/Physics/CharacterController.cpp

@@ -84,7 +84,7 @@ namespace Engine {
                 static_cast<f32>(p.GetZ())};
     }
 
-    void CharacterController::Teleport(const glm::vec3 &position) {
+    void CharacterController::Teleport(const glm::vec3 &position) const {
         m_Character->SetPosition(
             JPH::RVec3(position.x, position.y, position.z));
     }