💻Turbo PR #1427 by Rosa Gutiérrez: the first step toward full offline support in Turbo using service workers

New @hotwired/turbo/offline package + strategies: networkFirst, cacheFirst, staleWhileRevalidate.
Useful for PWAs and mobile apps built with Hotwire Native.

Ahead of her talk "Offline Mode to Hotwire with Service Workers" at #RailsWorld2025