Add infra-ops-toolkit plugin: topology diagram, html-to-pdf, teleport onboarding skills

Distills patterns from the Teleport access topology work: verified-data diagram
building, as-displayed HTML-to-PDF export via headless Chromium, and
container-scoped/host/database onboarding into an existing Teleport cluster.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01R3ZTfgQrkR3q8DSEoZAmvs

.claude-plugin/marketplace.json

@@ -19,6 +19,12 @@
       "source": "./plugins/shared-vault-sync",
       "description": "Safely pulls the shared vault at session start.",
       "version": "0.1.2"
+    },
+    {
+      "name": "infra-ops-toolkit",
+      "source": "./plugins/infra-ops-toolkit",
+      "description": "Topology diagram building, as-is HTML→PDF export, and Teleport resource onboarding skills.",
+      "version": "0.1.0"
     }
   ]
 }