docs: update resources API docs
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docs/api/resources/resource-dependency-graph/has-node.md
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docs/api/resources/resource-dependency-graph/has-node.md
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# HasNode
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检查节点是否存在。
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## 方法签名
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```cpp
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bool HasNode(ResourceGUID guid) const;
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```
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## 详细描述
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检查指定资源节点是否存在于依赖图中。这是在添加依赖关系前验证节点是否存在的常用方法。
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## 参数
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| 参数 | 类型 | 描述 |
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|------|------|------|
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| `guid` | `ResourceGUID` | 要检查的资源的全局唯一标识符 |
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## 返回值
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`bool` - 如果节点存在返回 `true`,否则返回 `false`
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## 示例
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```cpp
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graph.AddNode("texture"_guid, ResourceType::Texture);
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bool exists = graph.HasNode("texture"_guid); // 返回 true
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bool notExists = graph.HasNode("unknown"_guid); // 返回 false
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```
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