IL2CPP: Load metadata v27; mark broken areas with TODO

Il2CppInspector.Common/Reflection/TypeInfo.cs

@@ -803,7 +803,9 @@ namespace Il2CppInspector.Reflection
 
             // Pass-by-reference type
             // NOTE: This should actually always evaluate to false in the current implementation
-            IsByRef = Index == Definition.byrefTypeIndex;
+            // This field is no longer present in metadata v27
+            // IsByRef = Index == Definition.byrefTypeIndex;
+            IsByRef = false;
 
             // Add all implemented interfaces
             implementedInterfaceReferences = new TypeRef[Definition.interfaces_count];

Il2CppInspector.Common/Reflection/TypeModel.cs

@@ -198,6 +198,8 @@ namespace Il2CppInspector.Reflection
                     // It appears that TypeRef can be -1 if the generic depth recursion limit
                     // (--maximum-recursive-generic-depth=) is reached in Il2Cpp. In this case,
                     // no generic instance type is generated, so we just produce a null TypeInfo here.
+
+                    // TODO: Generic type definition index resolution is broken in metadata v27 (replaced with Il2CppType *type)
                     if ((generic.typeDefinitionIndex & 0xffff_ffff) == 0x0000_0000_ffff_ffff)
                         return null;