Added option expose valid game arguments

[Im-making-tools]

This allows to add enable rules and features to launcher arguments e.g. for v1.20.1. This enables to set quick play options, below example starts game connecting to localhost server:

from contextlib import ExitStack

from picomc.account import OfflineAccount, AccountManager
from picomc.instance import InstanceManager
from picomc.launcher import Launcher

PACK_NAME = 'test_1'
USERNAME = 'player'
VERSION = '1.20.1'

if __name__ == '__main__':
    with ExitStack() as es:
        launcher = Launcher(es)
        acc = OfflineAccount.new(AccountManager(launcher), USERNAME)
        im = InstanceManager(launcher)
        inst = im.create(PACK_NAME, VERSION)
        inst.features = {
            'is_quick_play_singleplayer': False,
            'is_quick_play_multiplayer': True,
        }
        inst.features_args = {
            'quickPlaySingleplayer': '',
            'quickPlayMultiplayer': '127.0.0.1:25565',
        }
        inst.launch(acc)

This would need minimal modifications to include in cli, as mentioned in #31