docs: fix Resources module API docs naming conventions and broken links

- Rename constructor/destructor files to follow template spec:
  - ctor.md → constructor.md, dtor.md → destructor.md (audioclip)
  - texture_constructor.md → constructor.md, texture_destructor.md → destructor.md (texture)
  - material-loader-constructor.md → constructor.md, material-loader-destructor.md → destructor.md

- Create missing constructor/destructor docs:
  - audio-loader: constructor.md, destructor.md
  - texture-loader: constructor.md, destructor.md

- Fix broken links to ResourceManager:
  - shader-loader/index.md
  - material-loader/index.md

- Remove duplicate folders (keep hyphenated versions):
  - Delete shaderloader/ (keep shader-loader/)
  - Delete resourcepackage/ (keep resource-package/)
  - Merge textureimportsettings/ into texture-import-settings/

- Rename audio-loader method files:
  - canload.md → can-load.md
  - getdefaultsettings.md → get-default-settings.md
  - getsupportedextensions.md → get-supported-extensions.md

- Update overview pages with proper method links and constructor/destructor entries

docs/api/resources/material-loader/index.md

@@ -20,8 +20,8 @@
 
 | 方法 | 签名 | 描述 |
 |------|------|------|
-| [MaterialLoader](methods/material-loader-constructor.md) | `MaterialLoader()` | 默认构造函数 |
-| [~MaterialLoader](methods/material-loader-destructor.md) | `virtual ~MaterialLoader()` | 析构函数 |
+| [MaterialLoader](methods/constructor.md) | `MaterialLoader()` | 默认构造函数 |
+| [~MaterialLoader](methods/destructor.md) | `virtual ~MaterialLoader()` | 析构函数 |
 | [GetResourceType](methods/get-resource-type.md) | `ResourceType GetResourceType() const` | 返回资源类型为 Material |
 | [GetSupportedExtensions](methods/get-supported-extensions.md) | `Array<String> GetSupportedExtensions() const` | 返回支持的扩展名列表 |
 | [CanLoad](methods/can-load.md) | `bool CanLoad(const String& path) const` | 检查给定路径是否可被加载 |
@@ -56,4 +56,4 @@ if (result.IsSuccess()) {
 
 - [Material](../material/material.md)
 - [IResourceLoader](../iloader/iloader.md)
-- [ResourceManager](../resource-manager/resource-manager.md)
+- [ResourceManager](../resourcemanager/resourcemanager.md)