feat: landing, login, and sign up welcome screens

[hanlinc27]

Notion ticket link

Welcome Page

Implementation description

• Created custom themes based off Figma
• Add in initial landing screen

09a165dd-3315-4360-a306-fa67d9222ff3.mp4

Steps to test

1. Verify everything renders properly and please run locally

Checklist

• My PR name is descriptive and in imperative tense
• My commit messages are descriptive and in imperative tense. My commits are atomic and trivial commits are squashed or fixup'd into non-trivial commits
• I have run the appropriate linter(s)
• I have requested a review from the PL, as well as other devs who have background knowledge on this PR or who will be building on top of this PR

[hanlinc27]

needs to be passed in explicitly instead of from the theme provider

[hanlinc27]

thoughts on extracting this component into its own file to reuse?

[Shehryar21]

I am getting 404 error when i click schedule a dropoff button

Screen.Recording.2021-11-03.at.2.57.38.AM.mov

.

[linnall]

Not sure if you got to this yet, but I think if you click on the 'x' it would redirect to the login page rather than the home page + back button on login page that redirects to home page

[hanlinc27]

Not sure if you got to this yet, but I think if you click on the 'x' it would redirect to the login page rather than the home page + back button on login page that redirects to home page

thanks for the catch @linnall ! fixed