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.
@aurimasv the suggested regexp doesn't work for me, I don't know the \b delimiter and can't find it used on another translator. The regexp copied/pasted doesn't work, can you tell me how to fix it ?