Add ropes cleanup

[adamnejm]

if SERVER then
	function ulx.ropes(ply)
		for k,v in pairs(ents.FindByClass("keyframe_rope")) do
			if v.Ent1 and v.Ent1:IsWorld() and v.Ent2 and v.Ent2:IsWorld() then v:Remove() end
		end
		
		ulx.fancyLogAdmin(ply, "#A removed all the world ropes")
	end
end

local cmd = ulx.command("Cleanup", "ulx ropes", ulx.ropes, "!ropes")
cmd:defaultAccess(ULib.ACCESS_ADMIN)
cmd:help("Removes all the world ropes")

[Derpius]

Definitely one we want. The less we're dependent on IsAdmin-gated cleanup functions the better