153 fix sign in redirects in clubkit

[christianhelp]

Why

Users would be redirected to their dashboard instead of the the protected route they wished to navigate to after signing in.

What

• Added middleware logic to redirect unauthenticated users to sign-in and keep track of the desired route they wish to be directed to after signing in
• Allowed a user to sign out while in between signing in and onboarding
• Updated the UI to better reflect the change above by rendering a "complete registration" button instead of the normal sign in and sign up buttons

Satisfies

#153

NOTE

Environment variables for Clubkit have been modified, but NEXT_PUBLIC_CLERK_SIGN_IN_FORCE_REDIRECT_URL and NEXT_PUBLIC_CLERK_SIGN_UP_FORCE_REDIRECT_URL should be removed from local .env files and from Portal's environment variables.