fix: very_good packages get gets stuck when using dependency via git https link but not authenticated

[orestesgaolin]

Description
When using pubspec.yaml dependency via https git url, but by default ssh authentication is used (so no ability to clone repository via https), the cli hangs. This caused us some problems as the CI was stuck for many hours on the dependency resolving step.

Steps To Reproduce

0. Use ssh instead of https authentication on GitHub
1. Add pubspec.yaml dependency using https link to a private GitHub repository e.g.

my_package:
    git:
      url: https://github.com/org/package.git
      ref: 1a61e2a62094aaf7614a4f8a0063863d21cc6e44

2. Run very_good packages get
3. See following prompt indefinitely

❯ very_good packages get
⠋ Running "flutter packages get" in⠸ Running "flutter packages get" in /Users/...

Expected Behavior
The action should fail with the clear information

Additional Context

Maybe timeout would be useful?

[wolfenrain]

Related: dart-lang/pub#2242

The very_good_cli should detect this and not keep it running indefinitely.