ci: add HOL skill-publish validate workflow

[internet-dot]

This repo already has enough skill metadata to validate in CI.

A couple of repo-specific details I checked first:

• AI-native — 461 MCP tools built for AI agents. Not a web UI with an API bolted on

• Kiln runs natively on Linux and Ubuntu under WSL 2

• Start the MCP server (uses printer from ~/.kiln/config.yaml)

• Detected skill package: .

This adds one workflow for . and leaves the runtime code alone.
It only runs the schema and trust checks for the skill metadata in validate mode.

If you would rather place the workflow under a different filename or point it at a different skill directory, I can adjust the branch.

[vercel]

@internet-dot is attempting to deploy a commit to the Noise App Team on Vercel.

A member of the Team first needs to authorize it.

[CLAassistant]

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 have signed the CLA already but the status is still pending? Let us recheck it.}