Dart-Code
Allow running the Flutter DevTools from source
Is your feature request related to a problem? Please describe.
When working on a Flutter DevTools 'plugin' (the plugin architecture hasn't arrived yet so for now I'm directly editing the DevTools) it would be great to have VS Code run DevTools from the edited source rather than use the globally installed binary.
We can of course run a Flutter app, copy the Observatory URL then run the DevTools and enter the URL but that workflow is a bit clunky, requires leaving VS Code and needs to be repeated manually each time.
Describe the solution you'd like
It would be great if we could have a setting that changed VS Code's behaviour to run DevTools from the source in a given directory, rather than running dart devtools.
Describe alternatives you've considered
In flutter/devtools/CONTRIBUTING > Development (VS Code Integration) they describe an option that instructs VS Code to run the tool/build_e2e.dart script instead of running dart devtools - this is great but takes a while and maybe overkill for people that don't need to run the server from local code.
