Add client method to create DM channel
Created by: alexhorner
Summary
Add the ability to easily open DM channels from the client by using only the ID of a user.
Details
This change add a method to the client in order to easily open DM channels by the ID of a user. This change is the result of not wanting to also use a REST client alongside a normal client just to open DMs easily.
Changes proposed
- Add the method CreateDmChannelAsync(ulong id) to the DiscordClient class