AX-2128 - Update plugin metadata: description, keywords, author

[davida-jfrog]

• Expand description and shortDescription to reflect the full bundle (skills, MCP server, Agent Guard, Agent Package Resolution) for Codex.
• Broaden keywords with security, agent-guard, ai-catalog, supply-chain, xray, devops, artifacts.
• Drop author email.

[github-actions]

Thank you for your submission, we really appreciate it. Like many open-source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution. You can sign the CLA by just posting a Pull Request Comment same as the below format.

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I have read the CLA Document and I hereby sign the CLA

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