feat: dockview accessibility

[iammola]

Wanted to improve the accessibility of the tabs and their panels.

Used the example in https://www.w3.org/WAI/ARIA/apg/patterns/tabs/examples/tabs-automatic/ essentially.

I started working on this yesterday because I need it for my project, and have just noticed the #700 also requests for this.

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Latest deployment of this branch, based on commit b021b9a:

Sandbox	Source
customheader-dockview	Configuration
dockview-app	Configuration
editor-gridview	Configuration
externaldnd-dockview	Configuration
fullwidthtab-dockview	Configuration
iframe-dockview	Configuration
keyboard-dockview	Configuration
nativeapp-dockview	Configuration
rendering-dockview	Configuration

[iammola]

hey @mathuo, just wanted to follow up on this PR. Is this something you have planned in the near future? Would you prefer any changes before moving forward? Thanks for your time! Your work on this package is well appreciated!

[p3yman]

Hey @mathuo, this sounds like a great feature to have. We are also investigating accessibility improvement on using DockView and like to have this one.

[iammola]

@p3yman, I've been using pnpm to patch my branch after locally building. I'm looking for feedback on the changes I've made and would appreciate any suggestions you have!