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/sampler/sampler.md

@@ -4,7 +4,7 @@
 
 **类型**: `class` (abstract)
 
-**头文件**: `RHISampler.h`
+**头文件**: `XCEngine/RHI/RHISampler.h`
 
 **描述**: GPU 纹理采样器抽象接口，用于配置纹理过滤和寻址模式。采样器定义了如何对纹理进行采样，包括过滤模式、寻址模式和各向异性级别等参数。
 
@@ -21,6 +21,8 @@
 
 | 方法 | 描述 |
 |------|------|
+| [`RHISampler`](constructor.md) | 默认构造函数 |
+| [`~RHISampler`](destructor.md) | 虚析构函数 |
 | [`Shutdown`](shutdown.md) | 关闭并释放资源 |
 | [`Bind`](bind.md) | 绑定采样器到纹理单元 |
 | [`Unbind`](unbind.md) | 解绑采样器 |