Pause on error from a wrapper script

On Windows, scrcpy paused on error before exiting to give the user a
chance to see the user message.

This was a hack and causes issues when using scrcpy from batch scripts.

Disable this pause from the scrcpy binary, and provide a batch wrapper
(scrcpy-console.bat) to pause on error.

Fixes #1875 <https://github.com/Genymobile/scrcpy/issues/1875>

app/src/main.c

@@ -98,11 +98,5 @@ main(int argc, char *argv[]) {
 
     avformat_network_deinit(); // ignore failure
 
-#if defined (__WINDOWS__) && ! defined (WINDOWS_NOCONSOLE)
-    if (res != 0) {
-        fprintf(stderr, "Press Enter to continue...\n");
-        getchar();
-    }
-#endif
     return res;
 }