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