feat(engine): add geometry class

src/Engine/Operator/Geometry.h

@@ -0,0 +1,22 @@
+#pragma once
+#include "Engine/Operator/Attribute.h"
+#include "Engine/Types.h"
+#include <variant>
+
+namespace enzo::geo
+{
+class Geometry
+{
+public:
+    Geometry();
+    ga::AttributeHandle<int> addIntAttribute(ga::AttributeOwner owner, std::string name);
+    std::shared_ptr<ga::Attribute> getAttribByName(ga::AttributeOwner owner, std::string name);
+private:
+    using attribVector = std::vector<std::shared_ptr<ga::Attribute>>;
+    attribVector& getOwnerVector(ga::AttributeOwner& owner);
+    attribVector pointAttributes_;
+    attribVector vertexAttributes_;
+    attribVector primitiveAttributes_;
+    attribVector globalAttributes_;
+};
+}