Accessibility audit

[alexreardon]

Fixes:

Keyboard usage during a drag #1288

It was found by @seancurtis the most consistent way to get good keyboard usage was to not be in the browse mode for screen readers. So we now state in the lift message that users should not use browse mode when dragging

Lift announcements #865

@seancurtis has converted our usage of aria-roledescription to aria-labelledby={ElementId} and pointed it to a visually hidden element (see useLiftInstruction()). This seemed to give good lift instructions.

Still to do /cc @stacylondon

• Test that aria-labelledby works on your hardware setups. Feel free to pivot strategy if you find a better approach. We tested on NVDA and JAWS and all seemed well
• Add Google lighthouse build to repo

Other things that need to be done, but don't feel like you need to

• Write small test for useLiftInstruction() (Will do later)
• Update screen-reader.md lift instruction docs