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/debug/filelogsink/constructor.md

@@ -0,0 +1,26 @@
+# FileLogSink::FileLogSink
+
+```cpp
+FileLogSink(const Containers::String& filePath)
+```
+
+构造函数，打开指定路径的文件用于日志写入。如果文件已存在，则追加写入；如果不存在，则创建新文件。
+
+**参数：**
+- `filePath` - 日志文件路径
+
+**线程安全：** ✅ 构造函数本身是线程安全的，但多线程同时创建同一文件可能会产生竞争
+
+**复杂度：** O(1)
+
+**示例：**
+
+```cpp
+auto fileSink = std::make_unique<XCEngine::Debug::FileLogSink>("logs/engine.log");
+XCEngine::Debug::Logger::Get().AddSink(std::move(fileSink));
+```
+
+## 相关文档
+
+- [FileLogSink 总览](filelogsink.md) - 返回类总览
+- [Debug 模块总览](../debug.md) - 返回模块总览