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/public/locales/en/auth.json

@@ -1,7 +1,9 @@
 {
   "signUpHeading": "Create an account",
   "signUp": "Sign Up",
+  "signUpSubheading": "Fill the form below to create an account.",
   "signInHeading": "Sign in to your account",
+  "signInSubheading": "Welcome back! Please enter your details",
   "signIn": "Sign In",
   "getStarted": "Get started",
   "updatePassword": "Update Password",
@@ -65,6 +67,7 @@
   "acceptTermsAndConditions": "I accept the <TermsOfServiceLink /> and <PrivacyPolicyLink />",
   "termsOfService": "Terms of Service",
   "privacyPolicy": "Privacy Policy",
+  "orContinueWith": "Or continue with",
   "errors": {
     "Invalid login credentials": "The credentials entered are invalid",
     "User already registered": "This credential is already in use. Please try with another one.",