Issue #3595601: polish the demo landing-page copy (EN + FR)
Polishes the Tugboat demo landing-page copy in .tugboat/setup.php (demo-only; the pdv module is unchanged).
- French: the translation read word-by-word. Fixed a mistranslation ("inline storage" had become "stockage en ligne" / online -> now "stockage intégré (inline)"), de-clunked several phrasings ("videz la file de re-chiffrement ... a l'aide de l'action ...", "le mappage d'un enregistrement et le depot d'un fichier", "y sauvegarder cet enregistrement"), and rewrote for natural flow.
- Both languages: aligned "consumer"/"consommateur" -> "service", to match the interface terminology (Trust a service, trusted services, the Demo service, a service simulator).
- English: also clarified the Webform sentence.
Code references to the consumer entity / consumers module are unchanged (correct per the established rename scope).