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

marketplace.json

@@ -39,6 +39,18 @@
         "authentication": "ON_INSTALL"
       },
       "category": "Productivity"
+    },
+    {
+      "name": "infra-ops-toolkit",
+      "source": {
+        "source": "local",
+        "path": "./plugins/infra-ops-toolkit"
+      },
+      "policy": {
+        "installation": "AVAILABLE",
+        "authentication": "ON_INSTALL"
+      },
+      "category": "DevOps"
     }
   ]
 }