Add transport support, gameobject queries, and fix item use

- Add setInstancePosition() to M2Renderer and WMORenderer for moving
  transport instances at runtime
- Detect UPDATEFLAG_TRANSPORT on gameobjects and track transport GUIDs
- Parse player-on-transport state from movement blocks
- Wire transport move callback in Application to update render positions
- Implement CMSG_GAMEOBJECT_QUERY / SMSG_GAMEOBJECT_QUERY_RESPONSE so
  gameobjects display proper names instead of "Unknown"
- Add name/entry fields to GameObject entity class
- Fix CMSG_USE_ITEM packet: remove extra uint8 that shifted the item
  GUID by one byte, breaking hearthstone and all item usage
- Remove redundant CMSG_LOOT after CMSG_GAMEOBJECT_USE for chests
- Show PvP enabled/disabled state in toggle message
- Relax WMO ramp wall-collision step-up check to allow walking on
  gentle ramps where floor rise per step is under 0.1 units
- Add M2 fallback when WMO group files fail to load for gameobjects
- Handle re-creation of existing gameobject render instances by
  updating position instead of silently ignoring

include/rendering/m2_renderer.hpp

@@ -208,6 +208,13 @@ public:
      */
     void renderM2Particles(const glm::mat4& view, const glm::mat4& proj);
 
+    /**
+     * Update the world position of an existing instance (e.g., for transports)
+     * @param instanceId Instance ID returned by createInstance()
+     * @param position New world position
+     */
+    void setInstancePosition(uint32_t instanceId, const glm::vec3& position);
+
     /**
      * Remove a specific instance by ID
      * @param instanceId Instance ID returned by createInstance()

include/rendering/wmo_renderer.hpp

@@ -75,6 +75,13 @@ public:
                            const glm::vec3& rotation = glm::vec3(0.0f),
                            float scale = 1.0f);
 
+    /**
+     * Update the world position of an existing instance (e.g., for transports)
+     * @param instanceId Instance to update
+     * @param position New world position
+     */
+    void setInstancePosition(uint32_t instanceId, const glm::vec3& position);
+
     /**
      * Remove WMO instance
      * @param instanceId Instance to remove