feat(Accordion): use native <details> element

[eirikbacker]

• Fixes Use of <details> in Accordion #2100 🥳
• Deprecates feat(Accordion): open when using search-in-page #2176
• Built on top of <u-details> for better accessibility on mobile
• Removes level from AccordionHeader as this is not supported by native <details>
• Removes onHeaderClick from AccordionHeader as this is identical to adding a onClick handler
• JS-based animation can be removed and replaced by CSS when calc-size(auto) is fully supported 🚀
• Fixes shrinking chevron on mobile/zoom
• Fixes text-align in AccordionHeader on mobile/zoom
• TODO: Check dir="rlt"

Question: It is now implemented so search-in-page only works when using defaultOpen, as a controlled open should not be affected by user interaction. Just checking - does this make sense to you guys as well? :)

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[mimarz]

Welcome back from vacay!

Thanks for making this, we'll have a look at this when the rest of the team is back :D

Just fyi, I am making some bigger architecture and ci improvements during the summer so things might be broken in next and/or so merge conflicts might arise 😅

[eirikbacker]

Thanks @mimarz :D
No stress - not back until next week anyway here - looking forward to hear and learn about rewrites :)
Hope summer was good!

[eirikbacker]

Closed as this will be replaced by #2363