Mark GamesServices class and methods as deprecated

[theLee3]

Marks deprecated and guides devs to the specialized classes. This will encourage devs to migrate so we can remove in a future version.

[Abedalkareem]

Hi,
Sorry for the late reply, The last month was really busy at work and home 🥹.

I think let's not do this move now because a lot of tutorials is using the old one and I don't think there is a harm in doing that, like this official flutter tutorial

https://docs.flutter.dev/cookbook/games/achievements-leaderboard

[theLee3]

No worries. Hope all is well.

I understand your point, but that is exactly why I think we should mark it as deprecated. We leave it in so that it still works, but it would encourage devs to use the new approach. The comments provided will allow the IDE to point the dev to the new classes & methods for achieving the same results as well.

I, of course, defer to you, but it's not uncommon for a package to have something marked as deprecated for many versions before removing it, so there is no rush to do so once marked.

As an added note, Dart's deprecated annotation allows us to set a timeline to show in IDE messages that gives devs information about when things will be removed, if we happen to set a date/version to sunset the GamesServices class in the future.