Add Flavors as a resource with full CRUD
Add Flavor with full CRUD

Has many-to-many relationship with Sauce
Replace [entity]_url with [entity]_path
Add more realistic db seeds
Clean up db migrations

- Remove comments from AddManySaucesToManyFlavorsAssociation
- Remove not needed column from Flavor
Add manufacturer as resource (minus delete)

- Removes Sauce.manufacturer as plain text
- Adds one-to-many association from Manufacturer to Sauce

[Finishes #50947663]