Add MCP server trust verification quickstart

Proposal

Add a quickstart example showing how to verify MCP server trust before connecting. Dominion Observatory provides free behavioral trust scores for 14,824+ MCP servers via a simple API:

curl "https://dominionobservatory.com/api/trust?url=brave-search"
# Returns: { "found": true, "trust_score": 75, "name": "brave-search-mcp-server", ... }

What the quickstart would show

1. Check a server's trust score before connecting
2. Set a minimum trust threshold
3. Block connections to low-trust servers

CI integration

We also have a GitHub Action that scans MCP configs on PRs and posts trust scores as comments:

- uses: vdineshk/dominion-observatory/github-action@main
  with:
    threshold: 50

No API key needed. Free and open-source.