Add Badge descriptions for all badges

[pe3ep]

Currently, only GeneralGoal badges have their description (as goal name), but it would be REALLY nice to have badge descriptions for badges with a Statistic goal as well.

I feel like changing Statistic here doesn't make sense, but maybe something like this could work?

type Badge {
    "The name of the badge."
    name: String!
    @spectaql(options: [{ key: "example", value: "Ace From Afar" }])

	"The description of the badge."
	description: String!
	@spectaql(options: [{ key: "example", value: "Eliminate all 4 members of the opposing team using ranged weapons" }])

    "The goal this badge requires."
    goal: Goal!

    "The stages of this badge."
    stages: [BadgeStage!]!
}