RFR: 8359257: Create accessibility protocol for TabGroup component [v3]

[Andy Goryachev]

On Thu, 12 Jun 2025 20:46:49 GMT, Alexander Zuev <kizune at openjdk.org> wrote:

>> Create implementation of the TabGroup protocol and assign it to TAB_PANE and PAGINATION roles.
>
> Alexander Zuev has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Add accessible role description to the base component

TabPane: can't find any differences between this PR and the master.  What should it say differently?

Also, unlike Pagination, VoiceOver in the TabPane correctly announces the tab number (like "You are currently on a selected tab, group, 106 of 200")

-------------

PR Comment: https://git.openjdk.org/jfx/pull/1823#issuecomment-2968369349