fix(命名空间): 修复Unitree SDK类型命名空间问题并重构PoseData

- 将ChannelSubscriberPtr改为unitree::robot::ChannelSubscriberPtr
- 重构PoseData结构为poseDate类，增加JSON序列化功能
- 更新相关代码以使用新的poseDate类

src/navigation.cpp

@@ -4,12 +4,12 @@
 namespace custom {
 
 Navigation::Navigation() : unitree::robot::Client(SLAM_SERVICE_NAME) {
-    subSlamInfo = ChannelSubscriberPtr(
+    subSlamInfo = unitree::robot::ChannelSubscriberPtr(
         new unitree::robot::ChannelSubscriber<std_msgs::msg::dds_::String_>(SlamInfoTopic));
     subSlamInfo->InitChannel(
         std::bind(&Navigation::slamInfoHandler, this, std::placeholders::_1), 1);
     
-    subSlamKeyInfo = ChannelSubscriberPtr(
+    subSlamKeyInfo = unitree::robot::ChannelSubscriberPtr(
         new unitree::robot::ChannelSubscriber<std_msgs::msg::dds_::String_>(SlamKeyInfoTopic));
     subSlamKeyInfo->InitChannel(
         std::bind(&Navigation::slamKeyInfoHandler, this, std::placeholders::_1), 1);