add new struct definitions

Il2CppInspector.Common/Next/BinaryMetadata/Il2CppGenericMethodFunctionsDefinitions.cs

@@ -0,0 +1,12 @@
+using VersionedSerialization.Attributes;
+
+namespace Il2CppInspector.Next.BinaryMetadata;
+
+using GenericMethodIndex = int;
+
+[VersionedStruct]
+public partial struct Il2CppGenericMethodFunctionsDefinitions
+{
+    public GenericMethodIndex GenericMethodIndex;
+    public Il2CppGenericMethodIndices Indices;
+}