README.md

Check which projects are affected by the cleanup and prevent deletion by commiting to them. 


1. run script gitlab_check_projects.py

- checks which projects are affected by deletions
- creates an Excel file (might contain projects that do not exist anymore in the UI)


2. modify excel

- modify column "keep_project" to define which projects to keep (use WAHR or FALSCH)


3. run script commit_to_keep.py

- creates commits for project that are marked with "keep_project"