feat(cipp): scaffold CIPP plugin

[asachs01]

Summary

• Scaffolds CIPP (CyberDrain Improved Partner Portal) plugin for M365 multi-tenant management
• 6 skills: api-patterns, tenants, users, standards, security, alerts
• 5 commands: tenant-summary, user-offboard, standards-check, security-posture, alert-review
• Registered in docs site under security category with alpha maturity

Test plan

• Verify npm run build in msp-claude-plugins/docs/ succeeds with new plugin entry
• Check CIPP appears under "Security" in the sidebar
• Verify all SKILL.md files have proper frontmatter (description + triggers)
• Verify all command .md files have proper frontmatter (name, description, arguments)
• Verify plugin.json follows the validated schema

Closes #24

🤖 Generated with Claude Code

[asachs01]

Review: CIPP Plugin Scaffold

Good content quality — skills have proper API endpoint tables, request/response examples, and error handling. Two blockers before this can leave draft:

Blockers

1. .mcp.json does not follow the gateway URL pattern and is missing auth headers

Currently points to ${CIPP_BASE_URL}/api with no headers block. The CIPP_API_KEY credential is never injected — the plugin will make unauthenticated requests. Should follow the established pattern:

{
  "mcpServers": {
    "cipp": {
      "type": "http",
      "url": "https://mcp.wyretechnology.com/v1/cipp/mcp",
      "headers": {
        "X-API-Key": "${CIPP_API_KEY}"
      }
    }
  }
}

If the gateway slug doesn't exist yet for CIPP, add a TODO noting that.

2. Double-nested cipp/cipp/ directory path

Should be cyberdrain/cipp/ (matching vendor/product pattern like kaseya/autotask/) or flat if treating CIPP as its own vendor namespace.

Other items

• Missing type: "http" in .mcp.json
• Inconsistent required field on command arguments (some commands omit it)
• inforcer-tenant-summary.md has no arguments: [] in frontmatter
• No Related Skills cross-linking between the 6 skills
• agents/.gitkeep placeholder has no precedent in other plugins — remove unless there's a plan