MUI v5

[Zenoo]

This PR works on bringing MUI v5 to the repo.

I'm having some issues with the ts config for this repo:

I'm also fixing some Typescript issues as I see them.
I will update this PR when the upgrade is done.

[Zenoo]

The main work is done.
All there is left is removing every useStyles and replacing them with the sx prop.
I'm doing that right now.

Another error I can't seem to fix is in the website editor:

[Zenoo]

Alright, I fixed the error in the Monaco editor.
Only the usestyles left.

[Zenoo]

Everything should be done!

[shadoath]

This looks really sweet @bareynol any plans to merge this and give users the option to swap between v4 and v5?

[Zenoo]

@shadoath You can already do that by accessing the usual URL for v4, and the URL from my fork for v5

[shadoath]

@Zenoo thank you I have bookmarked your repo!

Looking at the number of changes I now realize that there is no way to have both the v4 and v5 MUI active at the same time.

[vfproductions]

I mde a fork and fixed a few minor things for v5, but im a github noob so dont know what to do with it. Its here https://github.com/vfproductions/mui-theme-creator

[Zenoo]

@vfproductions You can imply open a PR on my fork https://github.com/Zenoo/mui-theme-creator/pulls

[vfproductions]

@Zenoo yep nevermnind.. I already did that, and you completed it, and it's showing up here, so all is good. Just not used to seeing commits in ascending order. Weird

[vfproductions]

I did have one more small thing to PR, see Zenoo#4