feat(header_silencieux) : ajout et application du filtre |header_silencieux (#5010)

feat(header_silencieux) : ajout et application du filtre |header_silencieux

Co-authored-by: JamesRezo <james@rezo.net>
Reviewed-on: https://git.spip.net/spip/spip/pulls/5010


Co-authored-by: JamesRezo <jamesrezo@noreply.git.spip.net>
Co-committed-by: JamesRezo <jamesrezo@noreply.git.spip.net>