This is a follow up to the feedback given in #129677:
Screenreader users are currently not being informed if there are inline suggestions available.

They have to check explicitly if there are inline suggestions available.

We should explore a push-based approach.

However, if there is almost always an inline suggestion (as it is the case with Copilot), too many notifications might get spammy very quickly.

A solution here might also be applied to diagnostics and quick fixes.