Add support for game multi instancing

[Mixaill]

In Wargaming Game Center application ID consist of 3 parts:

• application type
• realm code
• branch

So, for example, WOT.EU.PRODUCTION means that the game is the release version of World of Tanks for European region.

The other problem is that there is possible to have several WOT.EU.PRODUCTION games.

Currently, there is no way to set it up correctly in GOG galaxy 2.0.

I propose:

• to introduce game properties which can be changed in the GOG interface
• introduce field game_instance_id for LocalGame to earn possibility to have several versions of one game

Proposed API changes:

• PropertyDescription: new class
  • property_id: str
  • property_name: Dict[str,str]
  • property_description: Dict[str,str]
  • property_values: Dict[str, Dict[str,str]]
  • is_editable: bool
• LocalGame
  • add field game_instance_id: str
  • add field local_properties: List[str,str]
• Game
  • add field properties: List[PropertyDescription]
• Plugin
  • add function for overriding async def set_game_property(app_id : str, property_name: str, property_value: str)
  • change function launch_game(self, game_id: str): to launch_game(self, game_id: str, game_instance_id: str = None):
  • change function install_game(self, game_id: str): to install_game(self, game_id: str, properties: Dict[str,str] = None):
  • change function uninstall_game(self, game_id: str): to install_game(self, game_id: str, game_instance_id: str = None):

[apawlowskij]

Thank you for your proposal, we will consider it. Usually different builds of the same game (OBT/CBT/PTR/prod) are reported as separate games. As of now there is no real support for game realms/regions.