添加农业环境模块，集成 MQTT 客户端功能，支持配置参数和数据发布

components/agri_env/Kconfig.projbuild

@@ -0,0 +1,26 @@
+menu "MQTT 配置参数"
+config AGRI_ENV_MQTT_BROKER_URI
+    string "MQTT 服务器地址"
+    default ""
+
+config AGRI_ENV_MQTT_USERNAME
+    string "MQTT 用户名"
+    default ""
+
+config AGRI_ENV_MQTT_PASSWORD
+    string "MQTT 密码"
+    default ""
+
+config AGRI_ENV_MQTT_CLIENT_ID
+    string "MQTT Client ID"
+    default "agri-env-monitor"
+
+config AGRI_ENV_MQTT_PUBLISH_TOPIC
+    string "MQTT 发布主题"
+    default "agri/env/data"
+
+config AGRI_ENV_MQTT_SUBSCRIBE_TOPIC
+    string "MQTT 订阅主题"
+    default "agri/env/cmd"
+
+endmenu