Add Hermes Tweet plugin

[kriptoburak]

Summary

• Add Hermes Tweet to the Claude Code Zero marketplace manifest.
• Document Hermes Tweet in the README plugin list.
• Pin the source to the reviewed Hermes Tweet commit that includes the native Claude plugin manifest.

Validation

• unset CLAUDECODE && claude plugin validate .
• python3 -m json.tool .claude-plugin/marketplace.json
• git diff --check
• Checked added lines for sensitive or non-native terms.
• Verified the Hermes Tweet GitHub repository link returns HTTP 200.

[kriptoburak]

If this is useful and you merge it after checks pass, feel free to share the PR on X/Twitter and mention my handle, burakbayir. I can repost or retweet it to my 24k followers of developers and power users, which may help more relevant users discover this repo.