misc: drop typing as T, use builtin generics

Python 3.10 is the minimum, so annotations use `X | None`, `list[X]`
and friends, enforced by ruff's pyupgrade rules. The remaining typing
names are imported directly, with abstract types coming from
collections.abc. first() is now generic over the item and default.

pqcli/ui/base.py

@@ -1,6 +1,5 @@
 import abc
 import argparse
-import typing as T
 
 from pqcli.game_data import GameData
 from pqcli.mechanic import Player
@@ -11,7 +10,7 @@ class BaseUserInterface(abc.ABC):
     def __init__(
         self,
         roster: Roster,
-        player: T.Optional[Player],
+        player: Player | None,
         args: argparse.Namespace,
         data: GameData,
     ) -> None: