* Remove the 'app' domain from flutter daemon
By default the daemon won't register the "app" domain, you need to opt-in (which the 'run' command does, as well as the tests for the app functionality).
Fixes#6658.
* Tweak text
* Put restart/callServiceExtension/stop back into daemon mode
* Add a comment about removing discoverApps
* Fix anchors for GitHub
For some reason GitHub lowercases the anchor names so although these links all work in the local VS Code preview, the ones with capitals didn't work in the GitHub UI!
* Fix some typos