Add optional Xquik search and repair marketplace metadata

[kriptoburak]

Summary

• Adds an isolated, read-only xquik-search command with tests, documentation, and generated runtime output.
• Keeps Xquik credentials separate from account OAuth variables used by write commands.
• Uses the documented x-api-key header, a 15-second timeout, sanitized failures, and cursor pagination.
• Repairs the X API workflow so install, build, and test commands target the package that owns package.json.
• Rejects comma-only post IDs before API calls and covers the regression.
• Removes a missing marketplace source and synchronizes the plugin count and table.
• Synchronizes existing article-field support into checked-in runtime output.
• Synchronizes the native skill description with the 37-command package metadata.

Validation

• npm ci --prefix plugins/x-twitter/skills/x-twitter
• npm run build --prefix plugins/x-twitter/skills/x-twitter
• npm test --prefix plugins/x-twitter/skills/x-twitter - 100 tests pass
• Marketplace source, skill-doc target, version, and command-count validation
• Changed documentation link checks
• git diff --check

External check

GitHub marks the fork workflow as awaiting maintainer authorization. Local execution of the same install, build, and test steps passes on the exact head.

[kriptoburak]

@alberduris Published the consolidated repair as signed commit ce9c4b5. The read-only Xquik command remains isolated from account OAuth credentials and preserves cursor pagination. Independent repository repairs cover the X API workflow path, comma-only post IDs, missing marketplace metadata, checked-in article fields, and the stale 36-command skill description.

Validation passed on the exact head: clean install, build, 100 tests, marketplace and skill metadata checks, changed-document link checks, and git diff --check. GitHub still requires maintainer authorization before the fork workflow can run; no contributor-side failure or unresolved review request remains.