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.
Unfortunately, the tests will have to go, since those links are either dead or redirect to sudoc. It doesn't look like we're doing anything special for any of the records, so no big loss.