Add demo token endpoint and read-only frontend handling

Merge branch '001-HF-Deployment'

added Skeleton Animations , regular animations, more toasts, folder support, moving files within UI, start script for windows for back end and front end

Button moved, toast errors / success/ modal closes on submission.

oauth callback bug resolved.

Build attempt 1

notes displaying, portions of backend built

auth and settings

Document viewer done

Project scaffold