Add Kiro CLI to ACP provider catalog

Adds Kiro CLI as an opt-in ACP provider catalog entry, plus a generic ACP extension-notification sink so unknown notifications no longer fail JSON-RPC dispatch.

packages/app/src/data/acp-provider-catalog.ts

@@ -240,6 +240,15 @@ const CATALOG_DATA = [
     installLink: "https://kilo.ai/docs/code-with-ai/platforms/cli",
     command: ["kilo", "acp"],
   },
+  {
+    id: "kiro",
+    title: "Kiro CLI",
+    description: "Amazon's AI coding agent with native ACP support",
+    version: "manual",
+    iconId: null,
+    installLink: "https://kiro.dev/docs/cli/acp/",
+    command: ["kiro-cli", "acp"],
+  },
   {
     id: "kimi",
     title: "Kimi CLI",