change resources url to offuscate ID

Have a look at https://github.com/norman/friendly_id

and implement a solution at least for users and osbls

Exemples :

/utilisateurs/1 --> utilisateurs/maximilien-pressense
/osbls/1 --> associations/restos-du-coeur

Start by locating the routing and resource definitions for users and osbls, then review the friendly_id approach linked in the issue. Verify how each resource currently produces URLs and define completion as URLs using the requested human-readable identifiers instead of numeric IDs for both resource types.

Written by the indexing model from the issue text.