feat: add cli util that checks a folder of data items for validity

[fedellen]

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 93.30%. Comparing base (f10bdde) to head (447cc23). Report is 283 commits behind head on alpha.

Additional details and impacted files

@@           Coverage Diff           @@
##            alpha     #229   +/-   ##
=======================================
  Coverage   93.30%   93.30%           
=======================================
  Files          25       25           
  Lines        3642     3642           
  Branches      187      187           
=======================================
  Hits         3398     3398           
  Misses        243      243           
  Partials        1        1           

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.

:rocket: New features to boost your workflow:

• :snowflake: Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• :package: JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[dtfiedler]

:tada: This PR is included in version 1.29.0-alpha.1 :tada:

The release is available on:

• npm package (@alpha dist-tag)
• GitHub release

Your semantic-release bot :package::rocket:

[dtfiedler]

:tada: This PR is included in version 1.29.0 :tada:

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot :package::rocket: