docs: fix naming conventions across threading, math, memory, core, and debug modules

threading/:
- Rename 19 camelCase method files to hyphenated names
- task-system: createtaskgroup→create-task-group, etc.
- tasksystemconfig: enabletaskprofiling→enable-task-profiling, etc.
- thread: getcurrentid→get-current-id, etc.
- task: addref→add-ref, getid→get-id, etc.

math/:
- Rename underscore operator files to hyphenated
- vector3: operator_add→operator-add, etc.
- matrix4: gettranslation→get-translation, etc.
- vector4: tovector3→to-vector3, constructor_vector3→constructor-vector3
- sphere: sphere_constructor→sphere-constructor, etc.

memory/:
- Remove duplicate memorymanager/ folder (kept manager/ which was correct)

core/:
- filewriter: Consolidate ctor-default.md and ctor-file.md into constructor.md
- Rename dtor.md→destructor.md

debug/:
- filelogsink: Rename construct.md→constructor.md, ~filelogsink.md→destructor.md

All overview pages updated with new file references.

docs/api/threading/thread/get-name.md

@@ -0,0 +1,49 @@
+# Thread::GetName
+
+```cpp
+const Containers::String& GetName() const;
+```
+
+返回线程的名称。线程名称在调用 `Start()` 时通过参数指定，默认为 "Thread"。返回的引用指向内部存储的 `Containers::String` 对象。
+
+线程名称主要用于调试、日志记录和性能分析工具中标识线程。
+
+**参数：** 无
+
+**返回：** 线程名称的常量引用
+
+**线程安全：** ✅
+
+**示例：**
+
+```cpp
+#include "XCEngine/Threading/Thread.h"
+#include <iostream>
+
+using namespace XCEngine::Threading;
+
+int main() {
+    Thread t1;
+    t1.Start([]() {}, "RenderingThread");
+    
+    Thread t2;
+    t2.Start([]() {}, "PhysicsThread");
+    
+    Thread t3;
+    t3.Start([]() {});
+    
+    std::cout << "Thread 1 name: " << t1.GetName().CStr() << std::endl;
+    std::cout << "Thread 2 name: " << t2.GetName().CStr() << std::endl;
+    std::cout << "Thread 3 name: " << t3.GetName().CStr() << std::endl;
+    
+    t1.Join();
+    t2.Join();
+    t3.Join();
+    
+    return 0;
+}
+```
+
+## 相关文档
+
+- [Thread 总览](thread.md) - 返回类总览