feat: 初始化小米 IoT (MIoT) 智能家居 Go 库

- 实现 MIoT 客户端核心功能（MQTT 连接、设备管理、属性读写）
- 支持云端 API 调用与局域网设备发现（mDNS）
- 集成国际化（i18n）多语言支持
- 添加 MIoT 设备规约解析器（spec_parser）
- 包含单元测试与使用示例

miot/examples/mips_subscribe/main.go

@@ -0,0 +1,71 @@
+// E3 — MIPS cloud subscription example.
+// Demonstrates: connect to MQTT cloud broker → subscribe to device prop/event → wait for messages.
+package main
+
+import (
+	"fmt"
+	"os"
+	"time"
+
+	"miot"
+	"miot/examples/config"
+)
+
+func main() {
+	// 1. Load config
+	cfg, err := config.LoadConfig(config.DefaultPath())
+	if err != nil {
+		fmt.Printf("Load config error: %v\n", err)
+		return
+	}
+	if cfg.AuthInfo.AccessToken == "" {
+		fmt.Println("请先运行 E1 cloud_oauth 获取 token")
+		os.Exit(1)
+	}
+
+	// Need a device DID — hardcode or get from config
+	did := "2053225728" // use UID as placeholder, user should replace
+
+	fmt.Printf("使用 DID: %s (如无效请修改)\n", did)
+
+	// 2. Create MIPS cloud client
+	mips := miot.NewMipsCloudClient(
+		"ssl://cn-ha.mqtt.io.mi.com:8883",
+		"ha."+cfg.UUID,
+		miot.OAUTH2_CLIENT_ID,
+		cfg.AuthInfo.AccessToken,
+	)
+	fmt.Println("正在连接 MIPS Cloud...")
+	if err := mips.Connect(); err != nil {
+		fmt.Printf("MIPS Connect error: %v\n", err)
+		return
+	}
+	defer mips.Disconnect()
+	fmt.Println("MIPS Cloud 已连接")
+
+	// 4. Subscribe to property changes (wildcard: all properties)
+	propTopic := fmt.Sprintf("device/%s/up/properties_changed/#", did)
+	fmt.Printf("订阅属性: %s\n", propTopic)
+	_ = mips.Subscribe(propTopic, func(topic string, payload []byte) {
+		fmt.Printf("[属性变化] topic=%s, payload=%s\n", topic, string(payload))
+	})
+
+	// 5. Subscribe to events
+	eventTopic := fmt.Sprintf("device/%s/up/event_occured/#", did)
+	fmt.Printf("订阅事件: %s\n", eventTopic)
+	_ = mips.Subscribe(eventTopic, func(topic string, payload []byte) {
+		fmt.Printf("[事件] topic=%s, payload=%s\n", topic, string(payload))
+	})
+
+	// 6. Subscribe to device state
+	stateTopic := fmt.Sprintf("device/%s/state/#", did)
+	fmt.Printf("订阅状态: %s\n", stateTopic)
+	_ = mips.Subscribe(stateTopic, func(topic string, payload []byte) {
+		fmt.Printf("[状态变化] topic=%s, payload=%s\n", topic, string(payload))
+	})
+
+	// 7. Wait for messages
+	fmt.Println("\n等待设备消息 (60秒)...")
+	time.Sleep(60 * time.Second)
+	fmt.Println("示例结束")
+}