Add the Bootstrap JavaScript components

With this release you get a complete Bootstrap 5 setup, including the Bootstrap JavaScript Plugins and popperjs – all without having to run a single npm command :-).

Some very simple live examples at:

https://hugo-mod-bootstrap-scss.netlify.app/

See the exampleSite source for an example for how to set this up:

• https://github.com/gohugoio/hugo-mod-bootstrap-scss/blob/main/exampleSite/layouts/index.html#L28
• https://github.com/gohugoio/hugo-mod-bootstrap-scss/blob/main/exampleSite/assets/js/index.js