A way to set a ROS namespace in the Agent

還沒有人認領這個 Issue。

I would like to have the ability to set an arbitrary ROS namespace of the node from the computer running the Agent. The way of doing this in ROSSerial is to just run the `serial_node` under a namespace. In micro-ROS it's a little more problematic because the namespace has to be passed to `rclc_node_init_default` function, so it has to be retrieved before the ROS communication is initialized.

The way I see it could work is when the Agent could be run with some parameters and the client had functions to retrieve these parameters. Then, I could just define the `namespace` parameter and retrieve it in the firmware before initializing the node.

此 issue 未指出任何儲存庫檔案或測試。首先追蹤 Agent 的啟動流程，以及 Agent 參數與用戶端初始化之間的通訊路徑，注意 rclc_node_init_default 之前所需的 namespace。完成的標準是：啟動 Agent 時可以提供 namespace，用戶端可以在節點初始化之前取得該 namespace，並透過適當的測試進行驗證。

由索引模型根據 Issue 內容生成。