feat: add imessage rpc adapter

src/commands/agent.test.ts

@@ -212,6 +212,7 @@ describe("agentCommand", () => {
           .mockResolvedValue({ messageId: "t1", chatId: "123" }),
         sendMessageDiscord: vi.fn(),
         sendMessageSignal: vi.fn(),
+        sendMessageIMessage: vi.fn(),
       };
 
       const prevTelegramToken = process.env.TELEGRAM_BOT_TOKEN;