Publish uwtools releases to PyPI - #969

Synopsis

• build a PyPI wheel as part of the release workflow
• publish release wheels to PyPI using Trusted Publishing
• add CI build tooling to create wheel

Testing: I did a test on my fork (see PR here) and successfully published a package to TesPyPI, which you can try out here. I installed it locally, and confirmed it was working and that ecflow was excluded from uw --help.

Documentation still needs to be written, but I don't feel I'm in a position to write it until it actually exists on PyPI.

Type

• Bug fix (corrects a known issue)
• Code maintenance (refactoring, etc. without behavior change)
• Documentation
• Enhancement (adds new functionality)
• Tooling (CI, code-quality, packaging, revision-control, etc.)

Impact

• This is a breaking change (changes existing functionality)
• This is a non-breaking change (existing functionality continues to work as expected)

Checklist

• I have added myself and any co-authors to the PR's Assignees list.
• I have reviewed the documentation and have made any updates necessitated by this change.
• Where helpful, I have written comments in this PR's Files changed view to assist reviewers.