add support to run dart commands

[ekuleshov]

• [ ] I'd be willing to implement this feature (contributing guide)

If it helps I can try to contribute implementation

Description

Motivation

Several commands aren't available, unsupported or about to be deprecated for the flutter command. For example, the flutter format is being replaced with dart format in one of the upcoming Flutter releases. Once that happen we won't be able to use flutter format to enforce the Dart code formatting in our build.

Suggested Implementation

The idea is to add support for the dart-run goal, similar to flutter-run

Alternate Implementations

N/A

[rfuerst87]

I'd be interested in that feature too. How can we help?