[NTG-context] workflow tool: add to git

In case you organize your ConTeXt projects in git repositories: "addtogit.py" is a little script that checks your log (or jlg) file for the local files used and adds them to the git stage. (No automatical commit so that you can check if you want these files.) Leaves out auto-generated files like "m_k_i_v_*". Needs Python and GitPython (pip install gitpython). https://codeberg.org/fiee/context-tools Have fun, Hraban