ENH: add ability to read notes from happi database

[tangkong]

Expected Behavior

If there are notes in the happi db, we should be able to read them into the machinery from #557.

Current Behavior

With #557 notes are only read from yaml files in either the user data directory or an environment variable

Possible Solution

This could be as simple as placing a dictionary similar to the notes yaml files into the happi container.

We would need to make the happi client more universally, instead of only from the CLI module

This was delayed because we think that lots of writes to the existing json db is annoying

Your Environment

pcds-5.7.2, assuming #557 is merged