Add support for drush CLI.

The module relies on Javascript in the browser to play the fun flushing sound.

In the case of CLI only development, perhaps a CLI flushing animation would be a good approach.

Please find the patch below to enable the sound playback on cache clear using Drush. Kindly note that this approach is currently compatible with MacOS and Linux operating systems.

This needs work for Linux & Windows.

CLI support for cache flushing on remote machines would also be nice to have.

`drush cache:rebuild -vvv` works however it is not as fun as an animated flushing ascii graphic would be.