Implement UI elements for creating, viewing, and commiting Resource drafts

[keithmanville]

Add elements for creating, viewing, and committing drafts of each of the resource types in the Dioptra UI. Drafts can be created from existing resource snapshots and prepopulated with that data via the /<resource>/{id}/draft endpoints, or drafts of a new resource can be created via the /<resource>/drafts endpoint. The interface for drafting a resource should be the same as creating a new resource, with the distinction being whether the user chooses to commit as a new resource or simply save as a draft.

Blocked by #537

Definition of Done

• New drafts can be created for all resources via the user interface
• Drafts based on existing resources can be created via the user interface
• The draft editing interface for all resources has a "Commit" button that properly uses the draft commit workflow endpoint