Manage Extensions and Repository Structure in Pixel

[duysqubix]

Discuss and implement a strategy for managing extensions within the gopxl organization. This includes:

• Deciding whether to maintain a mono-repo for extensions or separate repositories for each extension (e.g., PixelUI, gameloop).

• Ensuring that dependencies are properly managed, and extensions do not unnecessarily inflate the core Pixel package.

• Potentially migrating smaller utilities into a single extension repository while keeping larger projects in separate repositories.