feat(world-map): remove kVOffset hack, ZMP hover, textured player arrow

- Remove the -0.15 vertical offset (kVOffset) from coordinate_projection,
  coordinate_display, and zone_highlight_layer; continent UV math is now
  identical to zone UV math
- Switch world_map_facade aspect ratio to MAP_W/MAP_H (1002×668) and crop
  the FBO image with MAP_U_MAX/MAP_V_MAX instead of stretching the full
  1024×768 FBO
- Account for ImGui title bar height (GetFrameHeight) in window sizing and
  zone highlight screen-space rect coordinates
- Add ZMP 128×128 grid pixel-accurate hover detection in zone_highlight_layer;
  falls back to AABB when ZMP data is unavailable
- Upgrade PlayerMarkerLayer with full Vulkan lifecycle (initialize,
  clearTexture, destructor); loads MinimapArrow.blp and renders a rotated
  32×32 textured quad via AddImageQuad; red triangle retained as fallback
- Expose arrowRotation_ / arrowDS_ accessors on Minimap; clean up arrow DS
  and texture in Minimap::shutdown()
- Wire PlayerMarkerLayer::initialize() into WorldMapFacade::initialize()
- Update coordinate-projection test: continent and zone UV are now equal

Signed-off-by: Pavel Okhlopkov <pavel.okhlopkov@flant.com>

include/rendering/minimap.hpp

@@ -56,6 +56,9 @@ public:
 
     void setOpacity(float opacity) { opacity_ = opacity; }
 
+    float getArrowRotation() const { return arrowRotation_; }
+    VkDescriptorSet getArrowDS() const { return arrowDS_; }
+
     // Public accessors for WorldMap
     VkTexture* getOrLoadTileTexture(int tileX, int tileY);
     void ensureTRSParsed() { if (!trsParsed) parseTRS(); }
@@ -121,6 +124,12 @@ private:
     // Tile tracking
     int lastCenterTileX = -1;
     int lastCenterTileY = -1;
+
+    // Player arrow texture (MinimapArrow.blp)
+    std::unique_ptr<VkTexture> arrowTexture_;
+    VkDescriptorSet arrowDS_ = VK_NULL_HANDLE;
+    bool arrowLoadAttempted_ = false;
+    float arrowRotation_ = 0.0f;
 };
 
 } // namespace rendering