fix(codegen): Adds string intern, encoded int, enum and legacy version support (#613)

- [X] Adds Enum migration rule
- [X] Adds legacy version (writing full int for version field)
- [X] Adds encoded int attribute
- [X] Adds intern string attribute
- [X] Fixes missing base deserialize/serialize

Projects/SerializationGenerator/SerializableMigration/SerializableMigrationRulesEngine.cs

@@ -28,14 +28,15 @@ namespace SerializationGenerator
         {
             var rules = new ISerializableMigrationRule[]
             {
+                new EnumMigrationRule(),
+                new ListMigrationRule(),
                 new ArrayMigrationRule(),
                 new HashSetMigrationRule(),
                 new KeyValuePairMigrationRule(),
-                new ListMigrationRule(),
                 new PrimitiveTypeMigrationRule(),
                 new PrimitiveUOTypeMigrationRule(),
                 new SerializableInterfaceMigrationRule(),
-                new SerializationMethodSignatureMigrationRule()
+                new SerializationMethodSignatureMigrationRule(),
             };
 
             foreach (var rule in rules)