Add dos-kernel to Claude Plugins

[anthony-chaudhary]

Adds dos-kernel to 🔌 Claude Plugins.

DOS is a trust kernel for fleets of coding agents. The Claude Code plugin bundles, in one install:

• Hooks that adjudicate from evidence: verify-on-stop checks a "done" claim against git before Claude may stop; pre-tool hooks deny calls the kernel refuses with a structured reason.
• Lane leases so parallel Claude sessions on one repo don't collide on the same files.
• The dos MCP server (verify / arbitrate / refuse as tools).
• A generic dispatch skill pack (next-up, dispatch loops, replan, self-improve).

MIT, Python (pip install "dos-kernel[mcp]" is the one prerequisite). claude plugin validate --strict passes.