Add a rename command

[Danktuary]

Once the DB rewrite gets pushed, add a command that allows users to rename their currently pending requests, because of typos and casing and whatnot.

[Danktuary]

Suspending this for the time being because when editing the current poll embed, the preview emoji breaks because it no longer exists. When a global "CDN"-like server gets created to store these temporary emojis, create one there and do basically the same thing as PollController.approve().

[Danktuary]

Fun idea: create two separate commands (one that let's poll creators rename their currently pending polls, and another that let's all users make rename requests) and then a main rename command.

The main command would prompt the user, asking if they're trying to rename a pending poll or an emoji. However, it should automatically detect this is, for example, a user does >rename :emoji: newEmojiName, as opposed to >rename emoji newEmojiName.
First, it will prompt them about that. After that gets determined, it should make a client.commands.get().execute() call to the correct command. Of course, it Shou transform the output if necessary, similar to the >request command.

The DB may need to be restructured, though. Or maybe a polymorphic table would work. I dunno.

[Danktuary]

Resolved in Rinon v2! 🎉