Add a Makefile

[aholmes]

This Makefile is intended to make multi-machine development simpler. The mono-repo approach in BL_Python requires a few things that are now rolled up into a single make dev (or just make) command.

• Tests can also be executed with make test
• The CI/CD build can be executed with make cicd
• Automated formatting can be executed with make format
• Publishing to Test PyPI and PyPI can be done with make publish-all
• Clean up is done with make clean

The wiki will be updated to reflect this after merging this PR.

[kiarod]

Nice work Aaron! the Makefile makes jumping into the project much simpler