A ProcMon trace shows DLL lookup attempts against unrelated PATH entries (e.g., C:\Program Files (x86)\Nmap\python313.dll → NAME NOT FOUND) before aborting — suggesting the exe calls ...

Add support for specifying a custom Python interpreter when creating a uv virtual environment via isaaclab.sh. This would extend the existing --uv option to accept an optional --python /path/to/python ...