(Design suggestion) Migrate the UI to egui

[hardBSDk]

It will reduce the C code on the game.

[terrarier2111]

We were planning on migrating our UI impl to wgpu which should get rid of the majority of rendering-related c code. This is a huge project though as it requires first migrating large parts of this project to ECS, adding a layer of abstraction on top of our current opengl rendering code to make migration easier and allow for working on the new rendering backend while still switching back to the old, working opengl backend, and the finally build the actual new wgpu backend, this is a humongous task, but will be necessary as directly switching to wgpu is even more of a hassle