* add flutter run --machine flag
* refactor daemon stdin/out command stream/response
* extract daemon startApp method
* refactor flutter run --machine to call daemon.startApp

* merge `flutter skia` into `flutter screenshot`
* improve skia failed error message
* update help text - how to find diagnostic port for skia
* improve error message if skia capture fails

FormField is now a widget that can contain any type of field. Input no
longer has special code to handle form fields. Instead, there is a
helper widget InputFormField for using an Input inside a FormField.

Fixes https://github.com/flutter/flutter/issues/6097 and based on
feedback from the same.

* Fix Missing newline in flutter run help
Issue #6461

* Fix overtab from multiline

Fixes https://github.com/flutter/flutter/issues/6280

Fixes #6417

* implement app.stop() for release runs

* update comment

* remove the validator check for atom

* remove the atom launch config

* review comments

Previously we weren't using all the different weights of the font.

Disable features of `flutter run` that depend on the service protocol when running in release mode (#6571)

TBR @abarth

...until people understand them.

Fixes #4166.
Fixes #5120.
Fixes #5399.
Fixes #6507.

Try to be clearer that flutter-dev is a public mailing list.

We now create the Completer inside TransitionRoute, as with the popped
completer. Also, test that this future resolves at the appropriate time.

Also eliminate unused accentColor-related properties.

Use the typography specified in the theme rather than Typography.white.

Fixes #6591