* WIP main sidebar designs
* hover states and active states for main sidebar
* main and settings sidebar UI updates & improve performance using Link instead of <a>
* update borders to match rest of UI in all pages
* update borders of all containers to match rest of UI
* remove unneeded conditional
* custom messages component redesign and appearance settings layout changes
* improve UX of custom logo file uploader component to match designs
* fix sizing on custom logo upload field
* WIP footer customization new UI
* implement new UI for custom footer
icon selection
* update workspace chats to match new settings UI
* update system preferences to match new settings UI
* update export workspace chats button border
* update invitations settings page to match new settings UI
* update instance workspaces settings page to match new settings UI
* update instance workspaces to match new settings UI
* update api keys settings to match new settings UI
* update LLM preferences settings to match new settings UI
* update embedding preferences settings to match new settings UI
* update vector db preferences settings to match new settings UI
* align all buttons in settings pages
* update ui for data connectors to match rest of settings ui
* update UI for embed chat
* updated ui for logging page
* fix duplicate attributes left from merge conflicts
* fix dynamic class to use ternary
* remove transition classes where it is not needed
* added ui for custom welcome messages and added label for custom logo in admin settings
* linting
* fixing img to use light/dark modes
* converted ChatBubble into component
* implemented backend for welcome messages and admin appearance page
* completed custom welcome messages for admin
* finished custom messages for single user mode
* merged with master and linted
* improved UI for appearance settings pages
* linted and merged with master
* small updates
---------
Co-authored-by: timothycarambat <rambat1010@gmail.com>