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/(marketing)/_components/site-navigation.tsx

@@ -48,8 +48,8 @@ export function SiteNavigation() {
   return (
     <>
       <div className={'hidden items-center justify-center md:flex'}>
-        <NavigationMenu className={'px-4 py-2'}>
-          <NavigationMenuList className={'space-x-5'}>
+        <NavigationMenu>
+          <NavigationMenuList className={'gap-x-2.5'}>
             {NavItems}
           </NavigationMenuList>
         </NavigationMenu>