Add turbo-rails

[Francois-gaspard]

This adds turbo-rails to our rails app template, following https://www.hotrails.dev/turbo-rails
This will potentially allow us to (TL;DR):

• Make pages more responsive
• Optimize views, so we can respond with and render parts of the view rather than whole pages
• Push live updates to the browser if we feel fancy

[hiattp]

@Francois-gaspard Is this backwards compatible with turbolinks, i.e. if we merge this into verumex is the current turbolinks functionality going to break?

[janklimo]

Good job on this one @Francois-gaspard 👍

This should be compatible with Turbolinks given the changes in https://github.com/Verumex/verumex/pull/2495 Haven't merged this until we have a proof that the stack works with our platform. We can merge this once we get to a green build on that PR.