docs: update resources API docs

docs/api/resources/shader/getuniforms.md

@@ -0,0 +1,27 @@
+# Shader::GetUniforms
+
+```cpp
+const Containers::Array<ShaderUniform>& GetUniforms() const
+```
+
+获取着色器的 Uniform 变量列表。
+
+**返回：** `const Containers::Array<ShaderUniform>&` - Uniform 列表的引用
+
+**线程安全：** ❌ 非线程安全
+
+**复杂度：** O(1)
+
+**示例：**
+
+```cpp
+ResourceHandle<Shader> shader = ResourceManager::Get().Load<Shader>("shaders/vertex.glsl");
+const Containers::Array<ShaderUniform>& uniforms = shader->GetUniforms();
+for (const auto& uniform : uniforms) {
+    // 处理每个 uniform
+}
+```
+
+## 相关文档
+
+- [Shader 总览](shader.md) - 返回类总览