fix: change repo detection to search also in upper paths

[LukasN]

Checklist for PR

• PR is only about one and only one concern
• Description contains a short title, an optional description, and the sections BEFORE and AFTER
• (A) new short test(s) show(s) that the PR is working

Some more infos

• Short PR: adding two features and formatting code in other features is too much

• BEFARE and AFTER sections:

  BEFORE:
   The .git folder was expected to be in the same folder like the nx project
  
  AFTER:
    The .git folder is detected by using git rev-parse till the root folder of the repositiory is found.