Tailwind CSS 4 Migration (#100)

* Updated to TailwindCSS v4
* Moved CSS module to its own CSS file because of lightingcss strict validation
* Respect next parameter in middleware
* Updated all packages. 
* Split CSSs for better organization.
* Redesigned theme and auth pages
* Improved pill and header design
* Formatted files using Prettier
* Better footer layout
* Better auth layout
* Bump version of the repository to 2.0.0

packages/email-templates/src/components/cta-button.tsx

@@ -7,7 +7,7 @@ export function CtaButton(
 ) {
   return (
     <Button
-      className="w-full rounded bg-[#000000] py-3 text-center text-[14px] font-semibold text-white no-underline"
+      className="rounded-smbg-[#000000] w-full py-3 text-center text-[14px] font-semibold text-white no-underline"
       href={props.href}
     >
       {props.children}