Schema extra (#292)

* add extra to schema, fix #238

* remove validator_instance, switch arg order on function_after

* switch all schema typeddicts to total=False

Author: samuelcolvin

generate_self_schema.py

@@ -92,9 +92,6 @@ def type_dict_schema(typed_dict) -> dict[str, Any]:
         schema = None
         if type(field_type) == ForwardRef:
             fr_arg = field_type.__forward_arg__
-            fr_arg, matched = re.subn(r'NotRequired\[(.+)]', r'\1', fr_arg)
-            if matched:
-                required = False
 
             fr_arg, matched = re.subn(r'Required\[(.+)]', r'\1', fr_arg)
             if matched:
@@ -116,9 +113,6 @@ def type_dict_schema(typed_dict) -> dict[str, Any]:
             if get_origin(field_type) == core_schema.Required:
                 required = True
                 field_type = field_type.__args__[0]
-            if get_origin(field_type) == core_schema.NotRequired:
-                required = False
-                field_type = field_type.__args__[0]
 
             schema = get_schema(field_type)