Experimental Native Pyglet Windowing

[azhuchkov]

Motivation

This draft PR overhauls the windowing backend by replacing the moderngl_window wrapper with a direct, native pyglet integration. It’s intended to share my experiments with development workflows on a constrained laptop screen and to gather some feedback before deciding whether to pursue this direction.

Highlights

• Seamless compatibility with tiling window managers such as Amethyst and yabai.
• Support for multiple window styles — overlay (always on top), tool windows, and more — including upcoming macOS styling support not yet available in official pyglet releases.
• Option to preserve a fixed scene aspect ratio.
• F11 to switch between fullscreen and windowed modes.
• ...

Please check out the screenshots below and let me know if you think this is worth promoting to the master branch. Suggestions and testing are also very welcome!