feat(entrypoint): adds create-ssp entrypoint

[jpower432]

Description

Adds entrypoint for SSP creation.

Stacked with/Incorporates #103

Type of change

• New feature (non-breaking change which adds functionality)

How has this been tested?

• E2E tests added/tested - https://github.com/jpower432/trestle-bot/actions/runs/7147045342
• Unit tests added

Run steps locally with the image, if desired:

The steps below are run by the linked end-to-end test.

Note: the trestle workspace must be initialize and the profile my_test_profile and compdef my_comp_def must exist

# Image built from https://github.com/jpower432/trestle-bot/actions/runs/7147045342 or build locally
podman build -f Dockerfile -t localhost/trestlebot:test
podman run --rm --entrypoint trestlebot-create-ssp -v $(pwd):/data -w /data localhost/trestlebot:test --ssp-name test-ssp [email protected] --committer-name myname --profile-name my_test_profile --compdefs my_compdef --branch test --markdown-path markdown/system-security-plans/

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]

@beatrizmcouto Closing this for now and will reopen if needed.