Resolve "[Accessibility]: Accordions in conference"

oleksii sukhodolskyirequested to merge
o.sukhodolskyi/k3k-web-frontend:2343-a11y-accordions into main

All the changes are listed here

https://git.opentalk.dev/opentalk/frontend/web/web-app/-/issues/2343#note_169738

Some refactoring was done, to make all components use the common AccordionItem component

Note for QA: some accordions in the meeting rooms has slightly changed styling comparing to the testing. That's because now we use a standardized version of accordions everywhere.

Closes #2343

Edited by oleksii sukhodolskyi

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