Refactor and clean up codebase

- Removed unused constants and type aliases in app_spi_command_defs.h and temp_sensor.h.
- Simplified ISpiCommandHandler destructor to default.
- Eliminated redundant methods and comments in temp_sensor and usart0 files.
- Consolidated writeU32Le function to app_spi_command_defs.h for reuse.
- Updated comments for clarity and accuracy in task_manager.h and task_runner.cpp.
- Removed hardfault.h as it contained no declarations.
- Cleaned up CANFD and watchdog implementations by removing dead code and unnecessary comments.
- Updated version numbers in config.h to reflect recent changes.
- Enhanced error handling and diagnostics in hardfault handling.

GD32E508_DCU_APP/sys/task_runner.h

@@ -35,8 +35,6 @@ private:
     static void taskAdcTempSample();
     /** @brief 根据采样值计算工程量。 */
     static void taskAdcProcess();
-    /** @brief 兼容保留的 CAN 轮询任务。 */
-    static void taskCanRxPoll();
     /** @brief 解析并消费接收帧。 */
     static void taskCanRxParse();
     /** @brief CAN 周期发送任务；每 1ms 每通道发送一帧测试报文。 */