Add --show option to sync, to sync only specific show

[glensc]

Usage:

./plex_trakt_sync.sh sync --show='The Addams Family (1964)'

requires:

• Add search API to Plex #246

[BEisem]

I'm not sure if this is where you wanted me to comment ... my suggestion to add an error when a show is not found, I didn't mean to add it at the beginning. I meant to add it when the script exits. So for example, if I do:

bink@Homey-McPlexFace plex-trakt-sync-ep-lookup-quick % ./plex_trakt_sync.sh sync --show "Whose Line Is It Anyways"
INFO: Syncing with Plex BlaEis and Trakt binkatl
INFO: Syncing Show: Whose Line Is It Anyways
INFO: Loaded Trakt lists in 3.1 seconds
INFO: Server version 1.22.2.4282-a97b03fad updated at: 2021-04-16 06:24:29
INFO: Recently added: [<Movie:123435:Billy-Connolly:-Live>, <Movie:198356:The-Courier>, <Movie:198354:Heathers>, <Movie:198349:All-Dogs-Go-to-Heave>, <Movie:198347:Ninja-III:-The-Domin>]
INFO: Updated plex watchlist in 0.0 seconds
INFO: Completed full sync in 5.1 seconds

I purposely misspelled the title. It must have (internally) searched for the show, and not found it, right? It reports "Completed full sync in 5.1 seconds" before exiting. I think instead of doing that, it should say something about not being able to find the show "Whose Line Is It Anyways" ... I guess it's a minor thing, but I think it would be a bit more descriptive.

[glensc]

@BEisem noted!

however, it's difficult to implement nicely with the current code, as the --show is a hint (the value is not looked up when show variable is created).

so, I'll leave this as a low priority, to be implemented in the future.

EDIT: Draft PR: #249