Support for Gracenote Guide Data

[Phunky]

Is your feature request related to a problem? Please describe.
Emby media player has the ability to provide a high level of programming data for TV listings in the UK, US and Canada.

https://emby.media/support/articles/Emby-Guide-Data.html

It would be great to see support for this.

Describe the solution you'd like
Ability to map channels to actual TV listings to enable the correct tvgChn, tvgName and epgId to be defined in the playlists m3u.

Describe alternatives you've considered
I’ve implemented this within my own m3u by defining just the tvgChn value.

This allows you to still fallback to the source EPG if it’s not found in Emby Guide data.

Additional context
I’ve built a very crude scraper to gather channel listing information for TV networks in the UK and US.

https://github.com/Phunky/scrape-channel-listings

The guide data is source from Gracenote API which powers a lot of SmartTVs.

They do provide direct API access, but sadly don’t seem to be accepting new signups.