* Upgrade audioplayers to latest
There have been some important fixes recently. This fixes#1315.
Also, a fly-by upgrade of two other dependencies.
* Delete .gitignore “heading”
Just removed the old `ios/`, `macos/` and `android/` folders and recreated them using `flutter create .`, then massaged the runners back into working order.
Adds a template / sample for games built in Flutter, with all the bells and whistles, like ads, in-app purchases, audio, main menu, settings, and so on.
Co-authored-by: Parker Lougheed
Co-authored-by: Shams Zakhour
