Use AppId instead of GameId

[NGnius]

Please confirm

• [X] I have searched existing issues
• [X] This issue is not a duplicate of an existing one
• [X] I will fill this out to the best of my ability

Describe what you'd like to be able to do

Currently, PowerTools configs are tied to the GameId of the game since AppId of non-steam games used to always be 0. I've heard that has been fixed so all games have an AppId now.

AppId is easier to find for Steam Games since it's the ID used in the store. It also might be more deterministic than GameId, but I'm not sure how those are generated.

This change would break all existing configs, so it would be best to do it along with any other upcoming breaking changes cough docked and undocked profiles cough

Describe alternatives you've considered

Keep using GameIds. Nothing wrong with this, it's just a bit less user-friendly.

Anything else?

No response

[mkaflowski]

That would be great. I use powertools mostly for emus and that would be helpful.