[Vue Rewrite] Audio/Video playback from enclosures in FeedItem

[devlinjunker]

Related to #748

Follows #2361

🗒️ Summary

• Add Audio/Video Feed Item Playback
  • Play Audio at bottom of App, so you can still scroll articles
  • Play Video inline of FeedItem (unable to continue reading articles)
  • Playing Audio pauses video, playing video pauses audio

✅ Checklist

• Code is properly formatted
• Sign-off message is added to all commits

- [ ] Changelog entry added for all important changes. (Can we add the skip-changelog label to prevent the check for changelog? )

📷 Visual

Audio:

Video:

Pause other audio/video on play:

➡️ Up Next

• Fix Explore Page
• Error Messages (on backend request failure)
• Mobile friendly layout (since we are no longer displaying the feed item below the row)
• Settings in Sidebar
  • Keyboard Navigation
  • Mark on Scroll
  • Reverse Order (Oldest to Newest)
  • Upload/Download Subscriptions/Articles
• use ?selected=<id> url query parameter to store and parse which Feed Item is displayed in FeedItemDisplay (this will be useful for implementing the search bar - and allow navigating directly to the specific feed item)
  • Also need to update search provider php code
• Update Documentation for Front End
  • Developer
    • Frontend Tips/Organization
    • Front End Unit Tests
  • Sharing
  • Remove Frontend/JS Plugin Documentation
• addArticleAction Plugin API
  • Nextcloud News Code
  • Add to Bookmarks Example Plugin
  • Add New Frontend/JS Plugin Documentation

[devlinjunker]

if there are no issues with this PR, I will merge it in soon

[Grotax]

Works for me :)