add pink theme, convert hard-coded color names to variables

[rio-codes]

I created a pink palette and mode for risotto. I also modified logo.css and typography.css to use variables instead of hard-coded colors from the existing palettes, making it easier to add new palettes and modes in the future. Finally, I changed the existing dark and light mode files to use the original colors.

[rio-codes]

I know this hasn't been approved yet but do you mind if I start working on one of the existing issues?

[joeroe]

Please go ahead. I'll review this as soon as I can :)

[rio-codes]

Cool. Is there an existing issue that needs some love? I could maybe tackle #6 ?

[rio-codes]

Hi, I was wondering if you mind if I start another theme for this? I've been working on this Catppuccin palette project and I'd love to make a risotto theme for it. If you don't like this pink one you can cancel it, but it would be nice to have the changes to the variables in it, maybe a separate PR?

[rio-codes]

Breaking variable changes off into new PR.

[joeroe]

@rio-codes Sorry for the slow response. Both the pink and Catppuccin palettes are very welcome, if you still want to contribute them?