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/math/sphere/sphere.md

@@ -23,8 +23,8 @@
 
 | 方法 | 描述 | 线程安全 | 复杂度 |
 |------|------|----------|--------|
-| [`Sphere()`](sphere_default_constructor.md) | 默认构造，零初始化 | ✅ | O(1) |
-| [`Sphere(const Vector3&, float)`](sphere_constructor.md) | 从中心和半径构造球体 | ✅ | O(1) |
+| [`Sphere()`](sphere-default-constructor.md) | 默认构造，零初始化 | ✅ | O(1) |
+| [`Sphere(const Vector3&, float)`](sphere-constructor.md) | 从中心和半径构造球体 | ✅ | O(1) |
 | [`Contains`](contains.md) | 检测点是否在球体内 | ✅ | O(1) |
 | [`Intersects`](intersects.md) | 检测两个球体是否相交 | ✅ | O(1) |