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/miot_i18n.go

@@ -0,0 +1,84 @@
+// Package miot provides MIoT core client for Xiaomi Home devices.
+// This file is a direct port of py-miot/miot_i18n.py.
+package miot
+
+import (
+	"log"
+	"strings"
+)
+
+// MIoTI18n provides internationalization translation.
+// Translate by Copilot, which does not guarantee the accuracy of the
+// translation. If there is a problem with the translation, please submit
+// the ISSUE feedback. After the review, we will modify it as soon as possible.
+type MIoTI18n struct {
+	lang string
+	data map[string]interface{}
+}
+
+// NewMIoTI18n creates a new MIoTI18n instance.
+func NewMIoTI18n(lang string) *MIoTI18n {
+	return &MIoTI18n{
+		lang: lang,
+		data: make(map[string]interface{}),
+	}
+}
+
+// Init loads the i18n JSON file for the configured language.
+func (i *MIoTI18n) Init() {
+	if len(i.data) > 0 {
+		return
+	}
+	i.data = make(map[string]interface{})
+
+	data, err := LoadJSONFile(GenAbsolutePath("i18n/" + i.lang + ".json"))
+	if err != nil {
+		log.Printf("load i18n file error: %v", err)
+		return
+	}
+	if data == nil {
+		log.Printf("invalid i18n file: nil data")
+		return
+	}
+	i.data = data
+}
+
+// Deinit clears the loaded translation data.
+func (i *MIoTI18n) Deinit() {
+	i.data = make(map[string]interface{})
+}
+
+// Translate looks up a translation by dot-separated key.
+// It traverses nested JSON objects, e.g. "device.light.name"
+// -> data["device"]["light"]["name"].
+// If the key is not found, returns an empty string.
+// Optional replace map performs placeholder substitution: {key} -> value.
+func (i *MIoTI18n) Translate(key string, replace map[string]string) string {
+	result := i.lookup(strings.Split(key, "."))
+	s, ok := result.(string)
+	if !ok {
+		return ""
+	}
+	if replace != nil {
+		for k, v := range replace {
+			s = strings.ReplaceAll(s, "{"+k+"}", v)
+		}
+	}
+	return s
+}
+
+// lookup traverses the nested map using the given key segments.
+func (i *MIoTI18n) lookup(keys []string) interface{} {
+	var cur interface{} = i.data
+	for _, k := range keys {
+		m, ok := cur.(map[string]interface{})
+		if !ok {
+			return nil
+		}
+		cur = m[k]
+		if cur == nil {
+			return nil
+		}
+	}
+	return cur
+}