XF2 Style Zenitho 2.3.6

• [New] Added new style group for forum metrics: ↓├ XenTR ┤ Forum Metrics
• [New] Added XenForo Media Gallery (XFMG) statistics to forum metrics:
  • Total Media Items
  • Total Media Views
• [Improved] Rebuilt XFMG data fetch logic using XenForo architecture
• [Improved] Removed direct SQL usage in favor of Entity-based data fetching
• [Improved] Updated and versioned caching system
• [Improved] Enhanced performance and data accuracy
• [Update] The add-on for the theme has been updated.
• [Fixed] Compatibility issue with [XTR] Extended Sticky Alerts add-on resolved