Sign up Action

[fitzy1321]

Read the Supabase Docs and implement the following items:

• Supabase user Sign up needs to confirm email, read docs
• Email Confirmation Page (i.e. "Please check your email")
• Link in the users' email will need to hit a route to finish email confirmation
  • Prod: confirm via query params, send to supabase, set cookies, redirect to MainPage
• Dev: Get user session and redirect to dashboard