Produce an uber jar on release

[nikitawootten-nist]

User Story:

As a user of the OSCAL CLI, I would like accessible means to using the OSCAL CLI without relying on Maven or building the project locally.

Goals:

• [ ] Clear guidance on how to produce an uber jar locally
• [ ] Produce an uber jar as part of the release action
• [ ] Clear guidance on how to run the CLI from an uber jar

Dependencies:

N/A

Acceptance Criteria

• [ ] All website and readme documentation affected by the changes in this issue have been updated.
• [ ] A Pull Request (PR) is submitted that fully addresses the goals of this User Story. This issue is referenced in the PR.
• [ ] The CI-CD build process runs without any reported errors on the PR. This can be confirmed by reviewing that all checks have passed in the PR.