Create login frontend page

[aliicezhao]

Notion ticket link

Login Page

Implementation description

• Modified the Login to now display an email and password field, with validation
• Uses Redirect on success to go to pets
• If viewed on a phone in landscape, it becomes scrollable

Steps to test

1. Go to localhost:3000/login, make sure data is cleared
2. Both fields should throw error if invalid/empty field
3. On success, should redirect to /pets

What should reviewers focus on?

• Logging in and redirectly correctly
• Throwing errors correctly
• Any coding style/visual things that look off
• Unlimited attempts at logging in?

Checklist

• [ x] My PR name is descriptive and in imperative tense
• [ x] 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
• [ x] I have run the appropriate linter(s)
• [ x] 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

Scrrenshots

[sthuray]

Looks good! Login and error checking work properly. The only thing I'd say is that you'll need to handle some merge conflicts after Trinity's PR is merged in since there's some overlap here