Add publishing workflow and make CI workflow reusable

[davidorme]

This PR:

• renames the workflow files to make them project specific
• updates sdv_ci.yaml to make it reusable
• adds sdv_publish.yaml that uses trusted publishing to publish releases to TestPyPI and PyPI automatically.
• implements a test-pypi-only flag: if this is present in a release name, the package is only published to TestPyPI, useful for checking publication processes or other experimental packaging stuff.

Closes #158

[davidorme]

@jacobcook1995 I'm going to bypass protections on this and merge it down. I need to publish that microclimate data, so want to create a new release candidate. I'll probably end up picking cogs out of the ceiling, but...