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/thread.md

@@ -29,9 +29,9 @@
 | [`Start`](start.md) | 启动线程，执行传入的函数 |
 | [`Join`](join.md) | 等待线程结束 |
 | [`Detach`](detach.md) | 分离线程，使其独立运行 |
-| [`GetId`](getid.md) | 获取线程 ID |
-| [`GetName`](getname.md) | 获取线程名称 |
-| [`GetCurrentId`](getcurrentid.md) | 获取当前线程 ID |
+| [`GetId`](get-id.md) | 获取线程 ID |
+| [`GetName`](get-name.md) | 获取线程名称 |
+| [`GetCurrentId`](get-current-id.md) | 获取当前线程 ID |
 | [`Sleep`](sleep.md) | 线程休眠指定毫秒数 |
 | [`Yield`](yield.md) | 让出当前线程的时间片 |