Add achievement rarity to GameCenter plugin

ddossot commented 8 months ago

Support the rarityPercent property that was added to GKAchievementDescription in iOS 17.0.

Add rarity_percents to the achievement_descriptions event dictionary and wire the value from the newly introduced property,
Fallback to -1 if the iOS version is below 17.0 or if the achievement doesn't have a rarity percent value (i.e. nil is provided by GameKit).

Tested with Godot 3.5.0 and iOS 17, fetching achievements that have and do not have rarities.

ddossot commented 7 months ago

@Calinou Any interest in taking this one in?

Calinou commented 7 months ago

This looks good to me, but CI is failing.

ddossot commented 1 month ago

@Calinou @bruvzg Anything else preventing this PR to be merged?

godotengine / godot-ios-plugins