feat: add keyboard shortcut to disconnect & quit app

VoidLink/Input/StreamView.h

@@ -24,6 +24,7 @@
 - (void)toggleStatsOverlay;
 - (void)toggleMouseCapture;
 - (void)toggleMouseVisible;
+- (void)disconnectAndQuitApp;
 
 @end
 

VoidLink/Input/StreamView.m

@@ -960,6 +960,9 @@ static const double X1_MOUSE_SPEED_DIVISOR = 2.5;
         case UIKeyboardHIDUsageKeyboardC:
             [interactionDelegate toggleMouseVisible];
             break;
+        case UIKeyboardHIDUsageKeyboardD:
+            [interactionDelegate disconnectAndQuitApp];
+            break;
         default:
             break;
     }