Fullstack signup flow

[johnnyyliang]

Summary

Users are able to sign up from the fr*ntend and once signed up, are sent to their dashboard.

Testing

Went through sign up, successfully populated firebase and postgres on successful signup. Also correctly didn't allow for signup if not all fields were filled in.

Notes

• Ticket wanted to show that JWT token is active, but signup backend route doesn't return a JWT token. I implemented the JWT token in my earlier PR for signup controller and route if we want to reuse that but currently doesn't support JWT tokens
• Added some new fields in signup, namely organization name and organization description to match backend routes, not sure how we feel about location/look
• Moved some of the logic for verifying all fields are filled in on the last page to handleSignUp and changed type of "Create your workspace" to button, rather than submit because it wouldn't create users in Postgres (I'm guessing it's bc of handleNext, but not entirely sure)

[nfq2]

need to show an error pop up when account creation fails

[johnnyyliang]

Fixed the issue with password error handling