fix(physics): simple-physics motion type and velocity like live

Live's simple-physics constructions (40,786 in the captures):
- Motion type Fixed (5) for objects without a motionType (38,970). DLU read
  the level's motionType and, when there was none, sent 0, a value the
  client's motion-type enum does not have.
- Keyframed (4) for every moving platform (1,059 of 1,059) and for models
  without behaviors; Dynamic (1) for models with behaviors (655 of 666 model
  constructions follow this; DLU only switched it when a behavior was added
  or removed).
- No velocity for fixed objects (all 38,970); keyframed and dynamic objects
  have one. DLU wrote a velocity in every construction.
A level-set motionType still wins.

Test: ReplicaConstructionTest.SimplePhysicsConstructionLikeLive (values of a
captured smashable, LOT 12266); the existing SimplePhysicsTest bytes are
unchanged.

Check in game: moving platforms (AG, GF, NS, NT), spinners and other
simple-physics objects move and collide as before; smashables and static
objects stay put; on a property, placed models with and without behaviors
sit and run as before, including after picking them up and placing again.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

dGame/dComponents/SimplePhysicsComponent.h

@@ -30,6 +30,11 @@ class SimplePhysicsComponent : public PhysicsComponent {
 public:
 	static constexpr eReplicaComponentType ComponentType = eReplicaComponentType::SIMPLE_PHYSICS;
 
+	// Havok motion types the client reads as the physics motion state
+	static constexpr uint32_t MOTION_TYPE_DYNAMIC = 1;
+	static constexpr uint32_t MOTION_TYPE_KEYFRAMED = 4;
+	static constexpr uint32_t MOTION_TYPE_FIXED = 5;
+
 	SimplePhysicsComponent(Entity* parent, const int32_t componentID);
 	~SimplePhysicsComponent() override;
 
@@ -106,7 +111,7 @@ private:
 	/**
 	 * The current physics motion state
 	 */
-	uint32_t m_PhysicsMotionState = 5;
+	uint32_t m_PhysicsMotionState = MOTION_TYPE_FIXED;
 
 	bool m_DirtyPhysicsMotionState = true;