Allow users to add custom logos
## Problem Statement
Allow users to add custom logos to Crafty.
## Who will benefit?
Users who want their server's logo in Crafty
## Benefits and risks
What benefits does this bring?
- More customizable
What risks might this introduce?
- More configuration/uploads
## Proposed solution
- Allow users to upload a logo to appear on the login page.
- if a user uploads a custom long logo and custom square logo.
- Change "Crafty Control" on the login page to be our copyright.
## Examples
- Nextcloud
- Uptime Kuma
## Priority/Severity
- [ ] High (This will bring a huge increase in performance/productivity/usability)
- [X] Medium (This will bring a good increase in performance/productivity/usability)
- [ ] Low (anything else e.g., trivial, minor improvements)
issue