PSCE-249 - Add entrypoint for trestle YAML rule transformation

[jpower432]

Description

Adds rules transform entrypoint

• Updates CONTRIBUTING.md with updated components and code information
• Adds trestle rules transformation entrypoint script

Follow on work as discused with @afflom - convert the actions specific entrypoint wrappers to python.

Blocked by #53

Type of change

• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected) - Updates the location of the actions in the repo

How has this been tested?

• Unit test
• Integration tests

Tests

Tested existing autosync workflow with new action location.
https://github.com/jpower432/cautious-potato/actions/runs/6486219931

Tested rules transform workflow
https://github.com/jpower432/cautious-potato/actions/runs/6486995566

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

[jpower432]

@afflom I can break this down into multiple PRs if needed. The addition of the new entrypoint needed some restructuring and there is some cleanup of the test code in this PR.

[jpower432]

@afflom I moved the generic test code changes/cleanup to a new PR - #56

[jpower432]

Moved to draft while resolving conflicts.