Chatbot-UI legacy

[jaimejim]

Dear @mckaywrigley the git history shows that the legacy version on the repo is an older version from 4th of april 2023. Could you be so kind to update legacy with the commits before the UI went private as a service (with supabase, docker, etc) and with the additions from others please? The current legacy version is unfortunately unusable too. See 138950c for reference.