[Mutes] [Warnings] [Mod] Option to show an extra field with custom content on other moderation types

### What component of Red (cog, command, API) would you like to see improvements on?

Mutes, Warnings, Mod

### Describe the enhancement you're suggesting.

Already implemented on `ban` command for the `Mod` cog, I would love to see this for the other cogs like mutes and warnings when a DM is sent to the user. Also (if not already), added to the `kick` and `softban` commands for `Mod`.

Related issues/PRs where the idea comes from:
https://github.com/Cog-Creators/Red-DiscordBot/issues/5591
https://github.com/Cog-Creators/Red-DiscordBot/pull/6593

### Example Usecase
An example would be whether or not users can appeal a mute/warning. If so, providing instructions in the extra field.
### Example Commands
muteset dm sendmessage
muteset dm muteextrafieldtitle
muteset dm muteshowextrafield

warnset dm sendmessage
warnset dm warnextrafieldtitle
warnset dm warnshowextrafield

### Anything else?

_No response_