Docs: Update theme generator

[TreyRuffy]

Added a button to show all colors in the theme generator.

With the switch off:

With the switch on:

[TreyRuffy]

I realized I have to make a couple more changes before it can be merged. Expect them later today / tomorrow.

[TreyRuffy]

I forgot to leave a comment but this should now be ready for reviewing. Lmk if there's anything I should change!

[saadeghi]

Hey,
Thanks for the PR, (and sorry for the spaghetti code of this page 😅)
There's an issue with the value of all optional colors. It shows a color on the demo but another color on the code:

You can see this happening by pressing the random button a few times. For example in above screenshot, you can see *-content color of buttons don't match the ones in the code. Or the base-content color which should be dark in this screenshot but in the preview is light.

[TreyRuffy]

I was able to fix that issue in the latest commit. Additionally, I added a button to automatically generate the optional colors.

Show all enabled:

Show all disabled:

[sovetski]

Looks very good! Maybe it is not the correct place here, but what do you think guys about adding also border radius config to the theme generator config?

[saadeghi]

Thanks