OSCAL CLI Validation: Create content addressing FedRAMP's use of OSCAL CLI

[brian-ruf]

User Story

As an implementer of tools for authoring of a FedRAMP content, I need to understand the oscal-cli and supporting tools to process FedRAMP OSCAL constraints.

Content Location

This content must reside in the Developer Hub as follows:

Repo Location:

content/documentation/validation/oscal-cli

URL Location:

https://automate.fedramp.gov/documentation/validation/oscal-cli

Related Work:

N/A

[aj-stein-gsa]

@kyhu65867 I updated this issue with more detailed context clues to help. Let me know if you need more pointers or it is unclear.

[aj-stein-gsa]

@kyhu65867 also updated path, not ../validation-rules/.., but ../validation/.., had to align with other page issues I found that conflicted with the older Google Doc ADR.

[kyhu65867]

PR released.