New website todo list

Reply to contribute. Development branch: https://github.com/owncast/owncast.github.io/tree/owncast-docusaurus https://owncast-docs-dev-testing.pages.dev/

• Screenshot of iOS app on home page
• Fix "popular item" tag on home page merch store cards
• "Get started" category carrot auto expands when navigating to /docs but the content undernearth it doesn't.
• Write detailed chat overview document /docs/chat/
• The "Improve this page" section at the bottom of each doc doesn't look great.
• Add screenshot examples to action buttons doc /docs/api/actions
• The "choose the right video quality" doc /docs/video has too many different topics in it
• "Customize chat features" isn't a good category heading name
• Example of the Fediverse feed on the home screen needs to be custom made to look nice
• Update the screenshot example for "Extensible" feature on the homepage to something better
• The top level "Configuration" document is missing.
• "Optional / Advanced Features & Maintenance" is a bit too vague of a category heading
• Add screenshots for apps on watching via AppleTV doc /docs/watching-streams/devices-apple-tv
• Add screenshots for apps on watching via Amazon Fire TV /docs/watching-streams/devices-amazon-fire-tv
• Add screenshots for apps on watching via Google Chromecast doc /docs/watching-streams/devices-chromecast
• Add screenshots for apps on watching via Google TV doc /docs/watching-streams/devices-google-tv
• Add screenshots for apps on watching via iPhone & iPad doc /docs/watching-streams/devices-iphone-ipad
• Add screenshots for apps on watching via Kodi doc /docs/watching-streams/devices-kodi
• Add screenshots for apps on watching via LG TV doc /docs/watching-streams/devices-lg-webos
• Add screenshots for apps on watching via Samsung TV doc /docs/watching-streams/devices-samsung-tv
• Add screenshot for web UI /docs/watching-streams/owncast-web
• Set a proper og:image
• Feature list on home page needs a different design.