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/components/provider-icons.ts

@@ -1,4 +1,4 @@
-import { Bot } from "lucide-react-native";
+import { Bot, PackagePlus } from "lucide-react-native";
 import { ClaudeIcon } from "@/components/icons/claude-icon";
 import { CodexIcon } from "@/components/icons/codex-icon";
 import { CopilotIcon } from "@/components/icons/copilot-icon";
@@ -9,6 +9,7 @@ const PROVIDER_ICONS: Record<string, typeof Bot> = {
   claude: ClaudeIcon as unknown as typeof Bot,
   codex: CodexIcon as unknown as typeof Bot,
   copilot: CopilotIcon as unknown as typeof Bot,
+  kiro: PackagePlus,
   opencode: OpenCodeIcon as unknown as typeof Bot,
   pi: PiIcon as unknown as typeof Bot,
 };