Add concrete component script field support

engine/include/XCEngine/Scripting/ScriptField.h

@@ -23,7 +23,8 @@ enum class ScriptFieldType {
     Vector2,
     Vector3,
     Vector4,
-    GameObject
+    GameObject,
+    Component
 };
 
 struct GameObjectReference {
@@ -38,6 +39,20 @@ struct GameObjectReference {
     }
 };
 
+struct ComponentReference {
+    uint64_t gameObjectUUID = 0;
+    uint64_t scriptComponentUUID = 0;
+
+    bool operator==(const ComponentReference& other) const {
+        return gameObjectUUID == other.gameObjectUUID
+            && scriptComponentUUID == other.scriptComponentUUID;
+    }
+
+    bool operator!=(const ComponentReference& other) const {
+        return !(*this == other);
+    }
+};
+
 struct ScriptFieldMetadata {
     std::string name;
     ScriptFieldType type = ScriptFieldType::None;
@@ -99,7 +114,8 @@ using ScriptFieldValue = std::variant<
     Math::Vector2,
     Math::Vector3,
     Math::Vector4,
-    GameObjectReference>;
+    GameObjectReference,
+    ComponentReference>;
 
 struct ScriptFieldDefaultValue {
     std::string fieldName;