[Warnings] Add a [p]warnsguild command

[Slurpcy]

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

Warnings

Describe the enhancement you're suggesting.

A new command to warns, ie [p]warnsguild this would show the list of users who have been warned in a guild, this could be useful if u forgot which all user's currently have a warn and how many so we could take action as if a server is big u may forget which all user's u warned , what this would do is return a paginated embed with a list of users (only who have been warned) and with the no of warns they have and maybe also the total no points , this way we could run this cmd in a while and see the list ie members with more nos of warns will be placed higher on the list , this way if we have a rule ie 3 warns = temp mute or 5 warns = kick we could check the user's warns and initiate the action ourselves , this way we could easily even remove their history with casesfor command because we already know some mod action had taken place.

Anything else?

That's all

[Dav-Git]

You can already set up further moderation actions automatically with [p]warnaction and see the warnings (or general moderation actions) a user has accumulated using [p]casesfor.

Modlog entries (their history) can not be deleted rn (see #3927)

[Flame442]

A command to view all warnings in a guild is a fine suggestion, the specific command name may be better as something else (perhaps [p]warnings guild as an invoke_without_command subcommand of the existing [p]warnings command?)