feat: operator nm getter and operator input setting

src/Engine/Operator/GeometryOperator.h

@@ -1,5 +1,6 @@
 #pragma once
 #include "Engine/Types.h"
+#include <optional>
 
 namespace enzo::nt {
 
@@ -7,9 +8,16 @@ class GeometryOperator
 {
 public:
     GeometryOperator();
-    // nodeDef
+    bool setInput(unsigned int inputNumber, nt::OpId opId);
+    bool setOutput(unsigned int outputNumber, nt::OpId opId);
+    std::optional<nt::OpId> getInput(unsigned int inputNumber) const;
+    std::optional<nt::OpId> getOutput(unsigned int outputNumber) const;
 
 private:
+    std::vector<std::optional<nt::OpId>> inputIds_;
+    std::vector<std::optional<nt::OpId>> outputIds_;
+    unsigned int maxInputs_;
+    unsigned int maxOutputs_;
 
 };
 }