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.

README.md

@@ -1,4 +1,4 @@
-# GD32E508_DCU_APP README
+# GD32E508_DCU_APP README
 
 本 README 用来介绍 `/workzone/ROBOT_V2/DCU/DCU_APP/GD32E508_DCU_APP` 目录下各个代码文件的作用、分层关系和阅读顺序。
 
@@ -317,7 +317,7 @@
 ### `device/canfd.h`
 **作用：**
 - 定义 CANFD 模块对外接口
-- 定义诊断结构 `canfd_diag_t`
+- 定义诊断结构 `CanFd::Diag`
 - 定义状态发送载荷结构 `canfd_status_payload_t`
 
 **主要接口：**
@@ -331,7 +331,7 @@
 
 ---
 
-### `device/CANFD.cpp`
+### `device/canfd.cpp`
 **作用：**
 - 初始化 CANFD 工作模式
 - RX0 中断批量搬空硬件 FIFO0
@@ -488,14 +488,14 @@ main.cpp
   │    ├─ device/usart0.cpp
   │    ├─ device/temp_sensor.cpp
   │    │    └─ device/ADC.cpp
-  │    ├─ device/CANFD.cpp
+  │    ├─ device/canfd.cpp
   │    ├─ sys/task_manager.cpp
   │    └─ device/Timer.cpp
   │         └─ TIMER2_IRQHandler -> task_manager_tick_100us()
   │
   └─ sys/task_runner.cpp
        ├─ device/ADC.cpp
-       ├─ device/CANFD.cpp
+       ├─ device/canfd.cpp
        └─ sys/task_manager.cpp
 ```
 
@@ -523,7 +523,7 @@ main.cpp
 ### 建议优先修改的位置
 如果是改业务逻辑，优先看：
 - `sys/task_runner.cpp`
-- `device/CANFD.cpp`
+- `device/canfd.cpp`
 - `device/ADC.cpp`
 - `sys/task_manager.cpp`