GuildActions turned out to be a fairly pointless abstraction in the end.
It didn't really solve the problems it was meant to solve (that is,
reduce code spaghetti by having all inter-plugin calls go through a
single service, and allow easier ways to replace core plugins with
alternatives that share the same interface) any better than simply
using `this.getPlugin()` when needed, and introduced extra complexity
and made static analysis messier.
