Feat/add gh prs

[jpower432]

Description

Adds feature to support creating GitHub pull requests with Trestlebot

Type of change

• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

How has this been tested?

• Unit tests
• Integration test with GitHub Actions - https://github.com/jpower432/oscal-profiles/actions/runs/5557222957
• Regression test
• Check Only - https://github.com/jpower432/cautious-potato/actions/runs/5557255581/jobs/10150800653
• Updates - https://github.com/jpower432/oscal-profiles/actions/runs/5556842221/jobs/10150160324
• Regeneration - https://github.com/jpower432/cautious-potato/actions/runs/5557281110/jobs/10150857139

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 A note on this PR, making updates to show the steps to use the action with a token that is not the default GITHUB_TOKEN. Updates to actions/checkout with need to be made and the token will need to be passed to the trestle-bot actions for pull_request only. The options auth setup for git may be something to explore in the future.