Fix interior WMO floor gaps, water exit stair clipping, NPC equipment, portal animation

- Fix Stormwind barracks floor: interior WMO groups named "facade" were
  incorrectly marked as LOD shells and hidden when close. Add !isIndoor
  guard to all LOD detection conditions so interior groups always render.
- Fix water exit stair clipping: anchor lastGroundZ to current position
  on swim exit, set grounded=true for full step-up budget, add upward
  velocity boost to clear stair lip geometry.
- Re-enable NPC humanoid equipment geosets (kEnableNpcHumanoidOverrides)
  so guards render with proper armor instead of underwear.
- Keep instance portal GameObjects animated (spinning/glowing) instead
  of freezing all GO animations indiscriminately.
- Fix equipment disappearing after instance round-trip by resetting
  dirty tracking on world reload.
- Fix multi-doodad-set loading: load both set 0 (global) and placement-
  specific doodad set, with dedup to avoid double-loading.
- Clear placedWmoIds in softReset/unloadAll to prevent stale dedup.
- Apply MODF rotation to instance WMOs, snap player to WMO floor.
- Re-enable rebuildSpatialIndex in setInstanceTransform.
- Store precomputeFloorCache results in precomputed grid.
- Add F8 debug key for WMO floor diagnostics at player position.
- Expand mapIdToName with all Classic/TBC/WotLK instance map IDs.

include/rendering/wmo_renderer.hpp

@@ -171,6 +171,7 @@ public:
      * Get number of active instances
      */
     uint32_t getInstanceCount() const { return instances.size(); }
+    size_t getLoadedModelCount() const { return loadedModels.size(); }
 
     /**
      * Remove models that have no instances referencing them
@@ -262,6 +263,9 @@ public:
      */
     std::optional<float> getFloorHeight(float glX, float glY, float glZ, float* outNormalZ = nullptr) const;
 
+    /** Dump diagnostic info about WMO groups overlapping a position */
+    void debugDumpGroupsAtPosition(float glX, float glY, float glZ) const;
+
     /**
      * Check wall collision and adjust position
      * @param from Starting position