Fix FR committees

Use RQLFilterBackend; show mandates in rep list

Fix API inconsistencies

Needed because names are not unique (already 2 cases of 2 meps with the same name)

Remove remote ID on representatives

Enables having representatives belong to multiple chambers.
Import scripts now rely on the slug to identify representatives.
The remote_id field was moved to a website entity (linking to the
representative page on the chamber website).

Add chambers to API

Add francedata chamber creation helper

Remove fingerprints

Francedata representatives import fixes

Fix deps