Add expand all and collapse all buttons

### Product

axe-core

### Feature Description

Currently, we have to expand or collapse items on an issue report one at a time. Please add Expand All and Collapse All buttons so I don't have to click as much when there is a report with a lot of issues.

Steps:
1. Go to a page that has multiple errors.
2. In the Tools menu, choose Browser Tools.
3. Choose Web Developer Tools.
4. Click on the axe DevTools tab.
5. Click start new scan.
6. Click Scan all of my page
7. Wait for the results to appear

Desired result: At the top of the list of issues there are two buttons, one reading Expand All and one reading Collapse All. if I click Expand All, all of the items expand. If I then click Collapse All, all of the items collapse.

Actually result: I have to expand or collapse each item one at a time.