Unity-Py publication to Pypi

[mike-gangl]

create workflows in github for unity-py publication to pypi

[mike-gangl]

this can be a template workflow: https://github.com/podaac/data-subscriber/blob/main/.github/workflows/release.yml which we use to publish to pypi when a 'release' is created.

[mike-gangl]

Added as part of #36

[rtapella]

@mike-gangl is this Done?

[mike-gangl]

has been done for a while!