network, citra_qt: Give moderation permission to community mods

Based on the `roles` payload in the JWT, the rooms will now give mod permission to Citra Community Moderators. To notify the client of its permissions, a new response, IdJoinSuccessAsMod is added, and there's now a new RoomMember::State called Moderator.

src/citra_qt/multiplayer/host_room.cpp

@@ -113,7 +113,7 @@ void HostRoomWindow::Host() {
     if (auto member = Network::GetRoomMember().lock()) {
         if (member->GetState() == Network::RoomMember::State::Joining) {
             return;
-        } else if (member->GetState() == Network::RoomMember::State::Joined) {
+        } else if (member->IsConnected()) {
             auto parent = static_cast<MultiplayerState*>(parentWidget());
             if (!parent->OnCloseRoom()) {
                 close();