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/tasksystemconfig/thread-stack-size.md

@@ -0,0 +1,28 @@
+# TaskSystemConfig::threadStackSize
+
+```cpp
+uint32_t threadStackSize = 0
+```
+
+工作线程的栈大小（字节）。值为 0 时使用系统默认值。
+
+**类型：** `uint32_t`
+
+**默认值：** `0`（使用系统默认）
+
+**当前状态：** 此配置项当前未实际使用，工作线程始终使用系统默认栈大小。
+
+**示例：**
+
+```cpp
+TaskSystemConfig config;
+config.workerThreadCount = 4;
+config.threadStackSize = 1024 * 1024; // 预留配置项（当前未实现）
+
+TaskSystemConfig defaultConfig;
+defaultConfig.threadStackSize = 0; // 使用系统默认
+```
+
+## 相关文档
+
+- [TaskSystemConfig 总览](tasksystemconfig.md) - 返回类总览