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/main.h

@@ -15,7 +15,6 @@ enum system_task_t {
     TASK_ADC_VREF_SAMPLE = 0, /**< 采样 VIN/VREF 原始值任务。 */
     TASK_ADC_TEMP_SAMPLE,     /**< 采样内部温度通道原始值任务。 */
     TASK_ADC_PROCESS,         /**< 对 ADC 原始值进行电压与温度计算任务。 */
-    TASK_CAN_RX_POLL,         /**< 兼容保留的 CANFD 接收轮询任务。 */
     TASK_CAN_RX_PARSE,        /**< 解析并消费已接收 CANFD 帧任务。 */
     TASK_CAN_TX_SEND,         /**< CANFD 周期发送任务，每 1ms 每通道发送一帧。 */
     TASK_STATUS_LED,          /**< 状态灯维护任务。 */