Better exposed filters noUiSlider library is not installed locally

Problem/Motivation

When you enable drupal_cms_blog or drupal_cms_news recipe, the better_exposed_filters module is installed. We are not adding the noUiSlider library locally, so the module will fetch the external library, which results in a warning in the status report:

BEF: library noUiSlider

Better exposed filters library noUiSlider is not installed locally and will be loaded from CDN. Loading external files from a CDN may be a data protection violation.
Please install the library. For more information see README.md

This can be an issue from the privacy point of view. However, the library is used only in case the Sliders BEF widget is used and such widget does not seems to be used in Drupal CMS by default.

I am not sure if it is better to include the library locally - just in case someone will enable the widget + to hide the warning (as it can give an impression that the library will be loaded actually), or do nothing (but the warning will be in the status report). Probably a question for @pameeela and/or @jurgenhaas.

Steps to reproduce

Install Drupal CMS with news or blog recipe
Go to status report
See that there is a warning about noUiSlider caused by the BEF module

Proposed resolution

TBD

Remaining tasks

User interface changes

API changes

Data model changes