Feature: Add API Key support (🚧)

[grablair]

Resolves #339

This is a WIP change to add API keys. The feature is implemented and admins can create API keys and they can be used to access the APIs in a granular fashion. I still need to complete all translations, and want to give @daveearley an opportunity to review this sooner rather than later.

This also adds a migration to add account_id to the token table, so tokens can be set up on a per-account basis, and the auth flow knows which account a token is attached to, as we don't have the JWT payload to tell us. (TODO: May need to implement key filtering from view for multiple-account situations)

Tested with expired tokens, tokens with missing abilities, and valid tokens.

Checklist

• I have read the contributing guidelines.
• My code is of good quality and follows the coding standards of the project.
• I have tested my changes, and they work as expected.

Thank you for your contribution! 🎉

[daveearley]

Nice! Thanks for contributing this. I'll set aside some time tomorrow to review it.