Add a new option: -n/--no-window

This option will allow scrcpy to record the stream without display.

Signed-off-by: Romain Vimont <rom@rom1v.com>

app/src/scrcpy.h

@@ -15,6 +15,7 @@ struct scrcpy_options {
     SDL_bool show_touches;
     SDL_bool fullscreen;
     SDL_bool always_on_top;
+    SDL_bool no_window;
 };
 
 SDL_bool scrcpy(const struct scrcpy_options *options);