feat: add typing and project cleanup

[xhayper]

Closes #49 and #89 Also closes #48

What was implemented: Luau typing for the whole project Basic wally support Code cleanup to use some newer luau features (like how ipairs and pairs is not needed, and string interpolation) Added selene for linting Added Stylua for formatting

TODO:

• [x] - Work on add typing to Utility and Theme
• [ ] - Proofread all the typing that was added to see if it is correct
• [x] - String interpolation
• [ ] - Solve type error (This can requires some code change which i will not be doing)

Issues:

• Due to how the typechecker is, it is impossible to define ThemeData properly

[xhayper]

This is a very VERY large PR, so please do tons of testing and review before merging

[xhayper]

The commit history is kinda a mess so it's best that you also squash it