Update twilio-developer-kit plugin — refresh SHA, simplify entry

Add twilio-developer-kit plugin

.claude-plugin/marketplace.json

@@ -2014,6 +2014,20 @@
       "source": "./external_plugins/terraform",
       "homepage": "https://github.com/anthropics/claude-plugins-public/tree/main/external_plugins/terraform"
     },
+    {
+      "name": "twilio-developer-kit",
+      "description": "Twilio Skills provide procedural knowledge for AI coding agents — which APIs to use, in what order, and what to avoid. Covers SMS, Voice, WhatsApp, Verify, SendGrid, Compliance, and 30+ products.",
+      "author": {
+        "name": "Twilio"
+      },
+      "category": "development",
+      "source": {
+        "source": "url",
+        "url": "https://github.com/twilio/ai.git",
+        "sha": "0713fb1f40b5e871cad4c1c99f603c812431692a"
+      },
+      "homepage": "https://www.twilio.com"
+    },
     {
       "name": "typescript-lsp",
       "description": "TypeScript/JavaScript language server for enhanced code intelligence",