Public Build Artifact: Windows 3262279962

don't prefix the binary execution with the python interpreter

this commit also adds logic to decide at runtime if we should execute '/path/to/python3 /path/to/src/packages/buskill/root_child_mac.py' (the script) or '/path/to/buskill.app/Contents/MacOS/root_child_mac' (the binary) depending on how buskill itself was called.

No user will actually be executing src/main.py to launch the buskill app. But I do this all the time for rapid development. So this logic allows us to test out the root_child logic without having to actually build the root_child script into a binary