Expanded Profile Types - legislators/candidates

We have only created a specific user type (other than normal/individual) for organizations.
We should expand this to include a profile type for:
1) state legislators
2) Candidates for state legislators

This epic needs further discussion/scoping.

The issue names no files, tests, or entry points. Start by locating the existing organization and individual user/profile type definitions, then review how those types are used across the application before scoping legislator and candidate profiles; done requires an agreed design and implementation scope.

Written by the indexing model from the issue text.