Clean up styles.js

[grgia]

Convert the static styles in styles.js into functions that take the current theme as an argument instead of a static import. The default export of styles.js will still be the styles with the defaultTheme provided, so this doesn't break anything.

Remove the need to add dynamic styles manually to providers.

[grgia]

@chrispader mind updating the description here for your open PR?

[chrispader]

I can't update the issue description because i'm not the issue owner 🥴

[grgia]

gotta love github

[grgia]

not overdue

[chrispader]

@grgia is this done? :)

[grgia]

@chrispader should we close?

[chrispader]

yes 👍