Sergio Valor 44de2c7013 Add FPS counter, VSync toggle, shader metadata system, and multi-pass infrastructure ...

- FPS counter in window title (updates every 500ms)
- F4 key toggles VSync on/off
- Shader metadata: Name and Author from comments
- iChannel metadata parsing for multi-pass support
- Base structures: ShaderBuffer, ShaderPass
- FBO/texture management functions
- Updated all 11 shaders with Name/Author metadata

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Co-Authored-By: Claude <noreply@anthropic.com>

2025-11-16 15:22:06 +01:00

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