Completely Revamped UI and Working On Refactoring Entire Engine

I really tried making the UI look a lot nicer than the generic UI it was before, and I think it looks pretty nice. I might need to simplify some stuff, but I spent a long time trying to make the UI more welcoming and easy to use and for the UI to seem more playful in a way I guess, than the more mono font boring gray it was last time.

I also have started on completely refactoring the engine. The previous data stores and data types were too limiting and I made some bad decisions early on so starting from scratch is kind of necessary