Reorganize directory structure for ``python -m``

[sharktide]

restructuredpython-git-repo/
├─pyproject.toml
├─repy/
│ ├── init.py
│ └── transpile/
│ ├── init.py
│ └── main.py
│ └── launch/
│ ├── init.py
│ └── main.py
├── restructuredpython/
│ ├── init.py
│ ├── restructuredpython.py # contains main() and launch()
| |── everything else (predefined /*, cload.py etc.)

whew that was a work of art