Ability to add nutrition facts for a ingredient

[chiptopher]

Feature Request

As a user, I would like to be able to add ingredients to a list of ingredients.

Acceptance Criteria

When I can click a button and fill out fields corresponding to different sections of the nutrition facts label.

Notes

Maybe have a fixed number of fields to start with, or allow users to add their own fields in their settings. The first one would be simpler now, but harder to work with in the future. Going with the second one now would prevent the need for a migration in the database later.