新增 DfPlayer 和 CanMv 类，优化 UART 读写方法，更新 CommonCenter 以支持新类实例化

Core/App/Common/can_mv.hpp

@@ -0,0 +1,19 @@
+#pragma once
+
+#include <cstdint>
+
+#include "../Common/serial_port.hpp"
+
+class CanMv {
+public:
+    explicit CanMv(UART_HandleTypeDef* uart) : serialPort(new SerialPort(uart, kLength, kTimeout)) {}
+
+    ~CanMv() {
+        delete serialPort;
+    }
+
+private:
+    static constexpr uint32_t kLength  = 128;
+    static constexpr uint32_t kTimeout = 10;
+    SerialPort* serialPort;
+};