main: TAS Playback state label

During script playback/recording, the user has to see what happens currently. For that, a new label has been added to the bottom-left corner, always displaying the current state of the TASing system.

src/yuzu/main.h

@@ -318,6 +318,7 @@ private:
     QLabel* emu_speed_label = nullptr;
     QLabel* game_fps_label = nullptr;
     QLabel* emu_frametime_label = nullptr;
+    QLabel* TASlabel;
     QPushButton* gpu_accuracy_button = nullptr;
     QPushButton* renderer_status_button = nullptr;
     QPushButton* dock_status_button = nullptr;