Adding a translator for french union catalog CCFr

As requested in [Zotero Forum](https://forums.zotero.org/discussion/37503) I've built this first version of a translator. 

It still misses somes specific cases but works for > 90% of records I'd say. CCFr catalog is full of JS, not that easy to parse.

Tests are style missing, hope it's not blocking.
There was a typo in the regexp. Use this in Scaffold (otherwise escape backslashes)
`^https?://ccfr\.bnf\.fr/portailccfr/.*\b(?:action=search|menu=menu_view_grappage)\b`