Add support for GuildMember timeout

[maikdevries]

Feature

A GuildMember can now be timed out using the new timeout field of the PATCH /guilds/{guild.id}/members/{user.id} endpoint. This issue does exactly that.

Ideal solution or implementation

Add a field and the related methods to the GuildMember type which stores and handles the timing out of members. There seems to be a new permission as well with the flag MODERATE_MEMBERS which allows one to manage time outs in a Guild, which is something that needs to be implemented too.

As the Discord API states:

Timed out members will temporarily lose all permissions except VIEW_CHANNEL and READ_MESSAGE_HISTORY. Owners and admin users with ADMINISTRATOR permissions are exempt.

Alternative solutions or implementations

No response

Other context

Discord API reference and the Discord FAQ on timeouts.

Image of the client's preview of the new permission:

[SuperchupuDev]

There's a PR already #7104