Move documentation repo into component-library monorepo as package

[bkjohnson]

Description

In an effort to consolidate to a single repo, we should move the Jekyll/npm package vets-design-system-documentation into the component-library repo as a package.

Tasks

• Create a new documentation package in component-library repo
• Move src and config files into new package
• Move deploy Github action file into component-library root .github directory
  • This should be updated to only deploy to dev until we can confirm that things still work
• Update links to point to new location
• Update design-system-documentation README file to point to new location

Acceptance Criteria

• documentation repo lives as a package in the DST monorepo

[humancompanion-usds]

I see now that this is related to #1220. Why do we need a single repo? Don't we push and publish components and documentation for them on different timelines? Is the goal to unify that?

[caw310]

Closing as this is old and the VADS components have been updated so this should no longer be an issue. If there is still an issue with the new components, file a new bug.