mute welcome messages by default

yes, i have not changed notification settings from default (meaning no they are set to all messages) this "issue" personally was fixed by just muting the "welcome" channel on all servers I had joined it's just this approach scales badly and I feel like "all messages" or "only mentions" is still abit broad tbh either way what i was pointing at was just to make those system messages that are sent when people join to by default be silent