Initial Auth0 implementation

[somebody1234]

Pull Request Description

Warning

Untested proof of concept. It typechecks, but backend support would be needed to confirm whether it is complete

• Remove Cognito and add Auth0
• Remove registration pages and password management (now handled by Auth0)

Important Notes

• UI is not final, just the bare minimum required for things to theoretically work
• The bulk of the meaningful changes are in app/gui/src/authentication/auth0.ts
• Most of the rest is removing dependencies and pages that are no longer necessary (registration, change password, forgot password, login)
• Deep link redirects need to be tested
• "Auth state change" events (present in AWS Amplify for Cognito but not the Auth0 SDK) have been removed. How important those were will need to be evaluated

Testing Instructions

(None, does not work yet)

• Test:
  • Registration
  • Login via:
    • Google
    • Microsoft
    • Apple
    • GitHub
  • Logout
  • Changing password on Auth0 if supported

Checklist

Please ensure that the following checklist has been satisfied before submitting the PR:

• The documentation has been updated, if necessary.
• Screenshots/screencasts have been attached, if there are any visual changes. For interactive or animated visual changes, a screencast is preferred.
• All code follows the
  Scala,
  Java,
  TypeScript,
  and
  Rust
  style guides. In case you are using a language not listed above, follow the Rust style guide.
• Unit tests have been written where possible.
• If meaningful changes were made to logic or tests affecting Enso Cloud integration in the libraries,
  or the Snowflake database integration, a run of the Extra Tests has been scheduled.
  • If applicable, it is suggested to paste a link to a successful run of the Extra Tests.