[Enhancement] Allow custom yt-dlp options (#176)

* Added option for yt-dlp config file usage

* renamed yt-dlp config file

* refactored to use a precedence-based approach

* Updated README

README.md

@@ -56,6 +56,7 @@ If it doesn't work for your use case, please make a feature request! You can als
 - Reliable hands-off operation
 - Can pass cookies to YouTube to download your private playlists ([docs](https://github.com/kieraneglin/pinchflat/wiki/YouTube-Cookies))
 - Sponsorblock integration
+- \[Advanced\] allows custom `yt-dlp` options ([docs](https://github.com/kieraneglin/pinchflat/wiki/%5BAdvanced%5D-Custom-yt%E2%80%90dlp-options))
 
 ## Screenshots