[Enhancement] Allow configuration of media container format

[kieraneglin]

What's new?

• Allows configuring your preferred media container format on a Media Profile
  • Requires advanced mode to be enabled (upper right of form)
  • Works for audio and video. See the yt-dlp docs on --remux-video and --audio-format
  • NOTE: do not set this if you consume media via Plex
  • Resolves #379

What's changed?

N/A

What's fixed?

N/A

Any other comments?

N/A