- Integrated `stb_truetype` for advanced font rendering.
- Added support for external and system fonts with logging.
- Introduced new structures for glyphs, metrics, and kerning.
- Implemented functions for font state management and scaling.
- Improved glyph rendering, including subpixel and caching.
- Enhanced render surface initialization and scissor handling.
- Refactored stubbed functions with proper implementations.
- Added ABI compatibility checks for key structures.
- Improved logging, error handling, and code organization.
- Updated documentation and comments for better clarity.
