* Backport #31339

Add view on GitHub links for easier content editing from the docs

Add toasts to the components requiring JavaScript

* Expand advice for anchor-based controls

* Expand accessibility note in input group

* Correct statement about validation, fix server example

* Tweak label > accessible name

Co-authored-by: XhmikosR <xhmikosr@gmail.com>
Co-authored-by: Mark Otto <markd.otto@gmail.com>

* Move color utility callouts to start of page

Hierarchically/structurally, in the position they are currently at, the two callouts seem like they "belong" just to the "background color" section. Moving them to the start makes it clearer that those two callouts relate to everything in the page (both "Color" and "Background color" classes.

* Change heading level

otherwise the assistive technology callout looks like it's hierarchically under the "Dealing with specificity" heading

* docs(example): floating-labels' better Edge fallback

* docs(example): refactor floating-labels' CSS

* Make example less broken-looking

don't want to give impression that now it's ok to just sprinkle `role="button"` around. this at least makes the `span` keyboard-focusable, similar to at least the start of a custom control

Remove the class `.nav-item` from `.nav-link` inside the non `ul` or `ol` based navs.
This makes the consistency for `.nav-item` (This class will not be required on the `.nav-link`).
`.nav-item` was only required when you use `.nav-fill` or `.nav-justified` on the `.nav`. In other cases, it was redundant. And the purpose of `.nav-item` on `.nav-link`s can be achieved via flexbox utilities as well (Mentioned in the docs also).

* docs(example): drop IE workaround since it works fine in IE

* Serial comma

Co-authored-by: XhmikosR <xhmikosr@gmail.com>
Co-authored-by: Mark Otto <markd.otto@gmail.com>

Add role="dialog" in modals via JavaScript

Restore word-break: break-word on .text-break to fix text breaking on flex containers

Turns out this applies to IE11 as well as IE10, so this clarifies the docs callout.

Closes #25242

.

Co-authored-by: XhmikosR <xhmikosr@gmail.com>

- Closes #30796

- Adds .user-select-* utils from v5
- Adds button role attribute util, one of the top requested features in our issues for adding pointer cursors
- Adds new docs page to demonstrate both
- Includes Sass list for customizing user select

Backport of #30199 after adapting it for v4-dev.

- Refreshes the look and feel of the homepage with fresh colors, new content, and simplified styles.
- Updates docs button styles
- Replaces bytesize icons with Bootstrap icons
- Adds themes callout to examples page

Add a danger callout that the page is outdated

Use possessive form of it

Add a script to zip the built examples

* Change input group examples

* Update forms.md

* Update site/docs/4.4/components/forms.md

Co-authored-by: XhmikosR <xhmikosr@gmail.com>
Co-authored-by: Mark Otto <markd.otto@gmail.com>
Co-authored-by: Martijn Cuppens <martijn.cuppens@gmail.com>