feat: 添加多线程框架与轴周期接口

- 新增 MotionTickThread 线程模块
- main.cpp: 引入双线程架构（UserAppThread + MotionTickThread）
- Axis: 新增 cycle() 接口，添加 #pragma once 头文件保护
- App/CMakeLists.txt: 链接 pthread，重组源文件列表
- .gitignore: 排除 docs/html、.vscode、compile_commands.json

MotionLib/Inc/Axis.h

@@ -8,6 +8,9 @@
  * @copyright Copyright (c) 2026
  * 
  */
+
+#pragma once
+
 #include "Types.h"
 
 namespace plcopen {
@@ -54,6 +57,10 @@ public:
      * \param name   轴名称
      */
     explicit Axis(UINT axisNo = 1, std::string name = "Axis1");
+
+    void cycle();
+
+
 private:
     AXIS_REF ref_;
     MC_AXIS_STATE state_ = MC_AXIS_STATE::Disabled;

MotionLib/Src/Axis.cpp

@@ -18,4 +18,10 @@ Axis::Axis(UINT axisNo, std::string name) {
     ref_.axisName = std::move(name);
     ref_.axis = this;
 }
+
+void Axis::cycle()
+{
+    
+}
+
 }