Add new interaction utilities and role attr to Reboot (#30562)

- 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

site/docs/4.4/content/reboot.md

@@ -298,6 +298,15 @@ These changes, and more, are demonstrated below.
   </fieldset>
 </form>
 
+### Pointers on buttons
+
+Reboot includes an enhancement for `role="button"` to change the default cursor to `pointer`. Add this attribute to elements to help indicate elements are interactive. This role isn't necessary for `<button>` elements, which gets it's own `cursor` change.
+
+{% capture example %}
+<span role="button">Non-button element button</span>
+{% endcapture %}
+{% include example.html content=example %}
+
 ## Misc elements
 
 ### Address