feat(ethercat): 添加EtherCAT从站功能支持并优化同步机制

- 添加CAN反馈和ID快照SPI命令文件
- 移除EXMC组件依赖，精简项目配置
- 添加RAM函数段链接脚本，优化Flash等待周期抖动
- 实现EscExmcBus类，提供16位并行总线访问LAN9252
- 实现EscLan9252驱动，支持寄存器和PDI内存访问
- 实现EthercatSlave类，采用三缓冲机制进行PDO数据交换
- 实现EthercatSync同步管理，支持SYNC0/SYNC1中断和定时器模式
- 添加ISR执行时间统计和诊断功能
- 分离周期路径和事件路径通知机制，避免RMW竞态

GD32E508_DCU_APP/GD32E508_DCU_APP.cproject.yml

@@ -1,4 +1,4 @@
-# A project translates into one executable or library.
+# A project translates into one executable or library.
 project:
 
   groups:
@@ -44,6 +44,8 @@ project:
         - file: ./device/spi/app_spi_cmd_ota_wait.cpp
         - file: ./device/spi/app_spi_cmd_ping.cpp
         - file: ./device/spi/app_spi_cmd_can_bridge.cpp
+        - file: ./device/spi/app_spi_cmd_can_feedback.cpp
+        - file: ./device/spi/app_spi_cmd_id_snapshot.cpp
     - group: comm
       files:
         - file: ./comm/esc_exmc_bus.h
@@ -65,7 +67,6 @@ project:
     - component: Device:GD32E50x_StdPeripherals:CRC
     - component: Device:GD32E50x_StdPeripherals:DBG
     - component: Device:GD32E50x_StdPeripherals:DMA
-    - component: Device:GD32E50x_StdPeripherals:EXMC
     - component: Device:GD32E50x_StdPeripherals:EXTI
     - component: Device:GD32E50x_StdPeripherals:FMC
     - component: Device:GD32E50x_StdPeripherals:GPIO