Export external/mds

[bennapp]

Motivation

This was ran from the rake mds:export helper in bigmaven (that script converts file paths that will only work in bigmaven to relative file paths which are needed for standalone external mds). This also includes many lint fixes that were required from bigmaven.

We also had to make some small configuration changes like changing a linter to get the results of the export green.

Acceptance Criteria

PR upkeep checklist

• [ ] Change log entry
• [ ] Label(s)
• [ ] Assignee(s)
• [ ] Deployment URL: https://mavenlink.github.io/design-system/$BRANCH/
• [ ] (When ready for review) Reviewer(s)
• [ ] Green Bigmaven CI check
• [ ] DevQA on Bigmaven staging (e.g. does the work need to be imported in the internal design system?)

[JustinRyanH]

@bennapp Do we need this still?