Make a 'pyproject.toml' to match progpy #29
Description
Requirement Text
Switch from using setup.py to using a 'pyproject.toml' file instead.
Background Information
Progpy recently switched, so it makes sense for prog_server to switch too.
DoD
Switched to the new file format, and updated the documentation on how to install a local dev build because "pip install -e ." won't work anymore. "python3 -m pip install ." seemed to work for me but may not be an editable install.