Add file syntax for customizing external subtitles

I know asking for this feature is a huge stretch since I can’t imagine this is useful in any situation except users who like dubbed anime but this could work just like the edition tag for the smart grouping features except you can add subtitle name, offset, and language.

So:

Death Note - S01E01 {name-DUBtitles (CC),lang-en,offset+5000}.vtt

Offset could be + or -. Hope that makes sense, this would be a pretty cool feature.