feat: add struct mapper for serialization

src/dumper/struct-mapper.cs

@@ -0,0 +1,50 @@
+using CUE4Parse.UE4.Assets.Objects;
+using System.Reflection;
+
+public static class StructMapper
+{
+    public static T MapToStruct<T>(this FStructFallback fallback) where T : struct
+    {
+        object result = new T();
+        var fields = typeof(T).GetFields(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
+
+        foreach (var field in fields)
+        {
+            if (field.FieldType.IsArray)
+            {
+                var prop = fallback.Properties.FirstOrDefault(p => p.Name.Text == field.Name);
+                if (prop?.Tag != null)
+                {
+                    var value = prop.Tag.GetValue(field.FieldType);
+                    field.SetValue(result, value);
+                }
+                continue;
+            }
+
+            try
+            {
+                var method = typeof(CUE4Parse.UE4.Assets.Exports.AbstractPropertyHolder)
+                    .GetMethods()
+                    .FirstOrDefault(m => m.Name == "GetOrDefault" && m.GetGenericArguments().Length == 1);
+
+                if (method != null)
+                {
+                    var genericMethod = method.MakeGenericMethod(field.FieldType);
+
+                    var value = genericMethod.Invoke(fallback, new object[] { field.Name, null!, StringComparison.Ordinal });
+
+                    if (value != null)
+                    {
+                        field.SetValue(result, value);
+                    }
+                }
+            }
+            catch (Exception ex)
+            {
+                Console.WriteLine($"Mapping failed for {field.Name}: {ex.Message}");
+            }
+        }
+
+        return (T)result;
+    }
+}