fix: Correct regression from pull #2124 (#2126)

Pycord requires typing_extensions as a dependency for python < 3.11,
however not on version >= 3.11. Because the changes in the referenced
pull always tries to load from typing_extensions, they make it so an
exception will be raised if the end user is using python >= 3.11 and
does not otherwise have that library installed when _parse_options is
 run (ie, whenever a command is registered).

This change checks the version of python running Pycord, then imports
stdlib typing if >= 3.11.

discord/commands/core.py

@@ -30,6 +30,7 @@
 import functools
 import inspect
 import re
+import sys
 import types
 from collections import OrderedDict
 from enum import Enum
@@ -44,8 +45,6 @@
     Union,
 )
 
-from typing_extensions import Annotated, get_args, get_origin
-
 from ..channel import _threaded_guild_channel_factory
 from ..enums import Enum as DiscordEnum
 from ..enums import MessageType, SlashCommandOptionType, try_enum
@@ -66,6 +65,11 @@
 from .context import ApplicationContext, AutocompleteContext
 from .options import Option, OptionChoice
 
+if sys.version_info >= (3, 11):
+    from typing import Annotated, get_args, get_origin
+else:
+    from typing_extensions import Annotated, get_args, get_origin
+
 __all__ = (
     "_BaseCommand",
     "ApplicationCommand",