Extranet l10n (#2284)

* do the localization of extranet when trying to localize en object

* add l10n widgets to extranet screens

* fix

* wip validator

* form

* Update db/migrate/20241003133515_add_published_to_extranet_localizations.rb

* Update db/migrate/20241003133515_add_published_to_extranet_localizations.rb

* Update db/migrate/20241003133515_add_published_to_extranet_localizations.rb

* merge before_action

* set not null default_language in extranets

* climate

* comments aren't useful as everything is named explicitly

* useless refactor

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