Fix pyrefly type checker issues

[BurnySc2]

Fix #221

[maxnus]

Is this valid syntax?

[BurnySc2]

Yes, it seems to be since Python 3.10(?) and I learned this syntax only recently.
The only documentation about it I could find quickly is here:
https://peps.python.org/pep-0484/#instantiating-generic-classes-and-type-erasure
with the example

data = DefaultDict[int, bytes]()

This also works for my_list = list[int]() and sets as well.

Speaking of py3.10+, I am not sure if this part of the code is being run in tests, so I'm not sure if this fails on python3.9.

Previously I had to change this to make it compatible with Python 3.9:
6fd85f7

Looking at the test runner, it seems it only complained about the union | operator, so this can actually stay the way it is, if I read this error right:
https://github.com/BurnySc2/python-sc2/actions/runs/22140288768/job/64002519619?pr=235

  File "/root/python-sc2/sc2/main.py", line 586, in play_from_websocket
    result = await _play_game(player, client, realtime, portconfig, game_time_limit=game_time_limit)
                   │          │       │       │         │                           └ 240
                   │          │       │       │         └ None
                   │          │       │       └ False
                   │          │       └ <sc2.client.Client object at 0x7f7bba532490>
                   │          └ <sc2.player.Bot object at 0x7f7ba9d9f130>
                   └ <function _play_game at 0x7f7ba9de73a0>

  File "/root/python-sc2/sc2/main.py", line 230, in _play_game
    result = await _play_game_ai(client, player_id, player.ai, realtime, game_time_limit)
                   │             │       │          │      │   │         └ 240
                   │             │       │          │      │   └ False
                   │             │       │          │      └ <examples.terran.mass_reaper.MassReaperBot object at 0x7f7ba9d9f070>
                   │             │       │          └ <sc2.player.Bot object at 0x7f7ba9d9f130>
                   │             │       └ 1
                   │             └ <sc2.client.Client object at 0x7f7bba532490>
                   └ <function _play_game_ai at 0x7f7ba9de71f0>

  File "/root/python-sc2/sc2/main.py", line 200, in _play_game_ai
    await run_bot_iteration(iteration)  # Main bot loop
          │                 └ 0
          └ <function _play_game_ai.<locals>.run_bot_iteration at 0x7f7ba9e7d790>

> File "/root/python-sc2/sc2/main.py", line 160, in run_bot_iteration
    await ai.on_step(iteration)
          │  │       └ 0
          │  └ <function MassReaperBot.on_step at 0x7f7ba9df3940>
          └ <examples.terran.mass_reaper.MassReaperBot object at 0x7f7ba9d9f070>

  File "/root/python-sc2/examples/terran/mass_reaper.py", line 154, in on_step
    await self.my_distribute_workers()
          │    └ <function MassReaperBot.my_distribute_workers at 0x7f7ba9df3af0>
          └ <examples.terran.mass_reaper.MassReaperBot object at 0x7f7ba9d9f070>

  File "/root/python-sc2/examples/terran/mass_reaper.py", line 313, in my_distribute_workers
    deficit_townhalls = dict[int, dict[Literal["unit", "deficit"], Unit | int]]()
                                       │                           └ <class 'sc2.unit.Unit'>
                                       └ typing.Literal

TypeError: unsupported operand type(s) for |: '_ProtocolMeta' and 'type'