Bundle turbo/offline UMD version

Unfortunately, ES modules in service workers aren't supported in Firefox
yet. They're coming in Firefox 147, in a few days, but in the meantime
we need to allow using `importScripts` in service workers, which
requires a UMD bundle. This adds it just for the offline functionality
that we need to import into the service worker.

Add also all bundles to the assets to be precompiled.

Author: rosa