HTTPS on frames via Caddy

[mariusandra]

• Adds Caddy onto the frames as a HTTPS proxy to make communication more secure.
  • Instead of http://frame.ip:8787/ you can now visit https://frame.ip:8443/ or https://backend:8989/api/frames/1/proxy/
• Changes backend auth from JWT to session cookies
  • Simplifies and speeds up image/asset fetching
• Adds up/down history into the terminal panel
• Add interpreted scenes to the list on the /c control URL
• Drag and drop uploads in the asset browser
• Fix crash on Debug panel
• Add a message/notification to bottom right for long running tasks (just sd card image for now)
• Change the NixOS mode to "discontinued".
• Show warnings when certs are about to expire (one year out)