Add Hermes Tweet skill

[kriptoburak]

Summary

• Add Hermes Tweet as a guidance-only Claude Code skill package.
• Register it in the SkillX Claude plugin marketplace catalog.
• Keep the package self-contained with no scripts, hooks, or runtime side effects.

Validation

• jq empty .claude-plugin/marketplace.json
• jq empty .claude/skills/hermes-tweet/.claude-plugin/plugin.json
• marketplace entry selection for hermes-tweet
• line-count check for the new skill package
• dash hygiene scan over edited files
• git diff --check
• Hermes Tweet public-safety scan: checked 35 files, 0 findings

Review notes

• I found no existing Hermes Tweet or Xquik pull request or issue in this repository before opening this.
• GitHub license detection did not report a license file, while the README says MIT; I noted that rather than treating it as a blocker.
• The source Hermes Tweet project is MIT licensed: https://github.com/Xquik-dev/hermes-tweet