feat: add support for exit on HUSKY = false

[Xemrox]

Description

Add support for skipping husky execution on $HUSKY="false". Implements #32

Type of change

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist

• [x] I have performed a self-review of my code
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] I have made corresponding changes to the documentation
• [ ] I have commented my code, particularly in hard-to-understand areas
• [ ] New and existing unit tests pass locally with my changes
• [ ] I did test corresponding changes on Windows
• [x] I did test corresponding changes on Linux
• [ ] I did test corresponding changes on Mac

[alirezanet]

Cool, thanks 💐

[alirezanet]

I forgot to mention with this change we also need to update the AttachCommand:

   private static string GetCondition(XContainer doc)
   {
      var condition = "'$(HUSKY)' != 0";
      var targetFrameworks = doc.Descendants("PropertyGroup").Descendants("TargetFrameworks").FirstOrDefault();
      if (targetFrameworks != null && targetFrameworks.Value.Contains(';')) condition += " and '$(IsCrossTargetingBuild)' == 'true'";

      return condition;
   }