add git diff target
BREAKING CHANGES:
- rename target
check/common/gitignoretocommon/git/check/gitignore
Add:
common/git/check/has-difftarget for checking that repo has no diff
BREAKING CHANGES:
check/common/gitignore to common/git/check/gitignoreAdd:
common/git/check/has-diff target for checking that repo has no diff