✈ 🔗 ♿ Improve Accessibility of the Table of Contents widget for better compliance (Duplicate of #23879) (Migrated from #30543)

Prerequisites • I have searched for similar feature requests in both open and closed discussions and cannot find an existing request. • I have verified that the feature is still missing from the latest stable versions of Elementor or Elementor Pro. Description The table of contents widget is a useful tool when building blog posts. However, I've found some potential areas that could be improved for a better user experience outlined in an [unlisted YouTube video]( The improvements include: 1. Using an established accordion pattern for the expanding panel, with an actual <button> element. 2. Using a button instead of two separate <div role="button"> to address keyboard issues like the <kbd>spacebar</kbd> events. 3. Deciding to either use the action in the name or the value, not both. So, either <button aria-label="open table of contents"> or <button aria-label="table of contents" aria-expanded="false…