Bloc titre (#2298)

* Block title

* wip

* wip migration

* migration

* working!

* cleanup

* Fix

* fix

* lib

* fixes from feedback

* wip (loca missing)

* done

* biography:text

* set migration as job

* prevent job enqueuing during migration

* reordering in block model

* 2 minute job, no need for special queue

* fix blocks enum scope

* fix

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Co-authored-by: Sébastien Gaya <sebastien.gaya@gmail.com>