BaseRepository includes all the non-guild-specific functionality,
such as with() and getRelations().
BaseGuildRepository includes guild-specific functionality, such as
getInstance().
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.
The fact that cases *with* a reason were being posted was actually an
unintended side effect of createCaseNote also posting the case after
creating the note. Had the issue with the cases not being posted not
existed, new cases with a reason would've been posted twice. This commit
changes this so createCaseNote doesn't post the case when used from
createCase, and fixes the actual case posting at the end of createCase.
