Add support for note-taking alongside existing sources

[benjspriggs]

It'd be nice to be able to take notes alongside existing entries, and have them be persisted alongside each entry.

[benjspriggs]

Will require user authentication, and some kind of per-user storage solution for the backend.

[benjspriggs]

Consider pouchdb for data sync and offline accessibility: https://pouchdb.com

[benjspriggs]

Consider auth0 for user auth and login security.

[benjspriggs]

Alternatively, for offline-first experience: https://turtle-db.github.io/

[benjspriggs]

Alternatively, for swapping out the API layer: https://github.com/feathersjs/feathers

[benjspriggs]

For security: https://medium.com/@eiri/couchdb-authorization-in-a-database-58c8ee633c96

[benjspriggs]

https://ayastreb.me/provision-couchdb-with-auth0/