[Enhancement] Auto-update yt-dlp

[kieraneglin]

What's new?

• Automatically updates yt-dlp on app boot and once daily thereafter
  • Instead of a daily check at a set time, it schedules the update daily at the time of app boot. This ensures all instances don't hit the update at the same time and it buys me a little time if a yt-dlp update breaks things
  • I initially didn't add this since I wanted to be able to update and test any changes myself, but it's been almost a year and I've encountered far more issues from delaying yt-dlp updates compared to an update causing compatibility issues

What's changed?

N/A

What's fixed?

N/A

Any other comments?

N/A