Expose CSS cursor information?

[aleventhal]

It's been proposed that CSS cursor rules can be a helpful indicator that content is interactive, when the author has not added keyboard support or ARIA.

There are cursors that indicate zoom, help, resize, draggable, etc. https://developer.mozilla.org/en-US/docs/Web/CSS/cursor

The cursor type could be exposed as custom properties in each accessibility API, e.g. an object attribute in ATK/IA2. The screen reader would then have an opportunity to expose the object as clickable/draggable/etc.

@joanmarie @cyns WDYT?