Determine and set a h1 element

[adagar]

Is your feature request related to a problem? Please describe
For users using non-traditional means of navigation through a11y tools, the h1 element is considered the title of the page. When users open storybook, what is considered the title? Is it the current element that is open?

Currently, the element that appears as the h1 header is an invisible error

Describe the solution you'd like
I'd like to see a header at the top of the page with the name of the chosen element and/or access tree (ex Basics < Document Formatting < With Markdown) so the purpose/content of the open webpage is immediately apparent.

Describe alternatives you've considered
To maintain visual clarity, an h1 that is only present for screenreader users could be used
https://webaim.org/techniques/css/invisiblecontent/

Are you able to assist to bring the feature to reality?
yes, I can

Additional context
Add any other context or screenshots about the feature request here.

[shilman]

We’re cleaning house! Storybook has changed a lot since this issue was created and we don’t know if it’s still valid.

Please open a new issue referencing this one if:

• this is still a problem in SB 7.x
• you can provide a consistent reproduction in 7.x (at https://storybook.new/ or per repro docs).