Toast component needs instantiation

Problem/Motivation

Unlike other components, Bootstrap 5 toasts actually need instantiation and can't rely just on using data-attributes or classes.

From the Bootstrap documentation:

Toasts are opt-in for performance reasons, so you must initialize them yourself.

(on the show method): Reveals an element’s toast. Returns to the caller before the toast has actually been shown (i.e. before the shown.bs.toast event occurs). You have to manually call this method, instead your toast won’t show.

Usage
Initialize toasts via JavaScript:

const toastElList = document.querySelectorAll('.toast')
const toastList = [...toastElList].map(toastEl => new bootstrap.Toast(toastEl, option))

This means, as they are right now on UI Suite Bootstrap:

- Toasts wont' initialize and show automatically.
- If you try to show them ny passing the show class, settings such as delay and data-attributes will not have any effect

Steps to reproduce

- Use the "toast" component
- The toast won-t appear
- Settings passed as data-attributes won't work.

Proposed resolution

Add a small JS behavior to instantiate toasts.

Remaining tasks

Do the stuff

User interface changes

None

API changes

None

Data model changes

None