fix(rhi): Fix RHI abstraction layer API docs per api-skill.md template

- Rename texture/dtor.md to destructor.md per template spec
- Remove duplicate non-hyphenated fence docs (getnativehandle.md, issignaled.md, getcompletedvalue.md)
- Fix template field issues:
  - swap-chain, command-queue: 类型 now uses 'class (abstract)'
  - sampler: 头文件 now uses full path 'XCEngine/RHI/RHISampler.h'
  - types: 类型 fixed from 'structs' to 'struct'
  - enums: 类型 fixed from 'enums' to 'enum class'
- Fix include paths in command-queue and pipeline-layout code examples
- Create missing constructor/destructor docs for 11 classes:
  buffer, texture, shader, device, command-list, command-queue,
  fence, sampler, swap-chain, pipeline-state, pipeline-layout
- Update class overview pages to include constructor/destructor entries

docs/api/rhi/fence/fence.md

@@ -18,13 +18,15 @@ RHIFence 是 RHI（Render Hardware Interface）子系统中的围栏抽象接口
 
 | 方法 | 描述 |
 |------|------|
+| [`RHIFence`](constructor.md) | 默认构造函数 |
+| [`~RHIFence`](destructor.md) | 虚析构函数 |
 | [`Shutdown`](shutdown.md) | 关闭围栏并释放资源 |
 | [`Signal`](signal.md) | 发送信号（无参数版本） |
 | [`Signal`](signal-value.md) | 发送信号（带值版本） |
 | [`Wait`](wait.md) | 等待围栏达到指定值 |
-| [`GetCompletedValue`](getcompletedvalue.md) | 获取已完成的值 |
-| [`IsSignaled`](issignaled.md) | 检查围栏是否已发出信号 |
-| [`GetNativeHandle`](getnativehandle.md) | 获取原生句柄 |
+| [`GetCompletedValue`](get-completed-value.md) | 获取已完成的值 |
+| [`IsSignaled`](is-signaled.md) | 检查围栏是否已发出信号 |
+| [`GetNativeHandle`](get-native-handle.md) | 获取原生句柄 |
 
 ## 使用示例