Add roles/permissions feature to allow for custom access based on roles/groups.

[PylotLight]

Describe the solution you'd like

Users should be assigned roles/groups which allows certain access. This would cover multiple other issues mentioned here so this issue would be the overarching project/issue to add in the capability for granular permissions for users.

Type of feature

User Interface (UI) + API

Additional context

Example roles:
Admin:
User
Guest/Anonymous
Custom

Permissions:
Notes - Create, Read, Update, Delete
Users - Create, Read, Update, Delete
Comments - Create, Read, Update, Delete
Sharing - Create shared links
Export/Import - Allow/Deny
etc... for all other permissions.

Potentially relevant libraries/docs:
https://pkg.go.dev/os/user
https://github.com/Permify/go-role/
https://github.com/casbin/casbin
https://github.com/mikespook/gorbac
https://mikebolshakov.medium.com/custom-role-based-authorization-in-golang-ba6d5585a521
https://github.com/qor/roles

[PylotLight]

Other issues that might be addressed by this issue:
#3217
#3260