extension frontend redesign

kinda self explanatory ngl

# Complete

- [x] sign in
- [ ] create/join room
- [ ] rule config*
- [x] chat ui **
- [ ] screenshots commented

notes:
*
- kinda fine as is maybe change the background a bit but low priority

**
- also kinda fine, its a bit bland but its where the majority of time spent on the extension will be if other pages change enough to where the overall design is different then definitely change but if not maybe just small changes.