Improve and update docs

[CanePlayz]

This pull request is aimed at improving and updating the outdated documentation. This is just a first draft to look at, more improvements will be made.

I've also decided to split the getting started guide into a basic, a GUI, and a CLI part to reduce the massive length of that file. Help with new options I missed or factual corrections on the more recent stuff would be much appreciated.

[Tyrrrz]

Thank you. It looks good :) Ready to merge?

[CanePlayz]

Yup, I think I got everything in that I wanted

[Tyrrrz]

Merged, thank you