Refactor Code, added default logo, added new pages

[noodaj]

Description / Changes Made

Backend

• Added unfollowing route to get non-following posts
• Added user_id in the user collection for referencing throughout our application

  Explore page

• Changed friends page to explore page that encompasses Explore and Friends under one. There is a button to switch between screens.

  Profile page

• Added slug route for users
• Moved the profile in the profile page to its own component to be used by both the profile page and the author slug route
• Added functionality to the ProfileEditModal

  Misc

• Added munch logo
• Fixed bugs with the new backend update to likes and comments
• Added types to reflect what is returned from the back

Portions of this code that utilized AI generation

None

How to Test

1. Clone repo
2. Remember to add the clerk_user_id in the backend to your user if you haven't
3. Run through all the pages

Checklist

• [x] I have added/updated relevant documentation, and I have followed the coding style guidelines.
• [x] I have added/updated tests, and I have run the test suite and all tests pass.
• [x] I have checked for any potential conflicts with other branches and fixed any merge conflicts.