Fix: Admin UI Authentication & Authorization

[danphenderson]

The Admin UI appears to only be working for unauthorized routes.

Implementing Authentication and Authorization as a starting point to resolve missing data when listing certain model views in Admin UI, e.g. User. I suspect Authentication and Authorization will solve the problem from my troubleshooting of creating a model in the UI, which results in a null user for the new experience ( inspecting the request in the console, it shows a null token was passed in the POST request).

Ref:

• Documenation
• Example

Reqs:

• Implement Authentication and Authorization in Admin UI
• Move/Refactor admin logic in app.main.py to app.api.routes.admin.py
• Update DropDown to include doc links for material ui, langchain, fastapi, pydantic, etc.
• Add tags to group ui Authorization and only display users' authorized routes.
• Fix issues listing certain model views.