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.
not sure if we every explained this, but we use this for all target regex, even where a site doesn't currently support https (as seems to be the case for ccfr), so that the translator doesn't break if they enable it later. That's particularly important as our automated tests wouldn't catch that.