Fetch donations after upload, sort donations by modify date

[bryanparmelee]

README.md

• Removes outdated setup instructions, adds updated instructions

firebase.ts

• Updated imports
• Renames ‘isEmailInvalid’ function to clarify that it is checking if email is use.
• Add resetPassword function

firebaseAdmin.ts

• Refactor ‘isEmailInvalid’ function to clarify purpose and improve functionality

join/page.tsx

• Remove deprecation alert
• Add email validation
• Add alert to email field if email is already in use

Login/page.tsx

• Add password reset link
• Add link to join page

Reset-password/page.tsx

• Add password reset functionality

Browse.tsx

• Fetches donations after uploading a new donation to ensure the browse page shows latest donations without needing to refresh browser.
• Sorts donations by modify date so newest (or most recently edited) donations appear at the top of the page.

ToaserNotifcation.tsx

• Add status for email already in use