feat: support typography plugin

[piemot]

Closes #40.
Adds a custom colour palette for the @tailwindcss/typography plugin with catppuccin colours.

Usage:

@import "tailwindcss";
@plugin "@tailwindcss/typography";

@import "@catppuccin/tailwindcss/mocha.css";
@import "@catppuccin/tailwindcss/typography.css";

<div class="bg-ctp-base">
	<article class="prose prose-catppuccin">
		<!-- ... -->
	</article>
</div>

[isitreallyalive]

Thank you for your work on this! It is much appreciated