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

apps/web/app/error.tsx

@@ -39,7 +39,7 @@ const ErrorPage = ({
           <div className={'flex flex-col items-center space-y-8'}>
             <div
               className={
-                'flex max-w-xl flex-col items-center space-y-1 text-center'
+                'flex max-w-xl flex-col items-center gap-y-2 text-center'
               }
             >
               <div>
@@ -48,7 +48,7 @@ const ErrorPage = ({
                 </Heading>
               </div>
 
-              <p className={'text-lg text-muted-foreground'}>
+              <p className={'text-muted-foreground text-lg'}>
                 <Trans i18nKey={'common:genericErrorSubHeading'} />
               </p>
             </div>