Use MainAPI to get folder prefix

[Luna712]

Rather than having to keep getFolder() and isEpisodeBased in sync, we can automate using a sub-folder if TvType is episode-nased. Also adds some documentation to TvType?.isEpisodeBased() and new TvType.getFolderPrefix()

[fire-light42]

I will have to double check this, but if we want to refactor this I would suggest the viewmodel to decide if it is episode based, because it has additional context like is EpisodeResponse.

cloudstream/library/src/commonMain/kotlin/com/lagradost/cloudstream3/MainAPI.kt

Line 1320 in 9c31d0a

return this is EpisodeResponse && this.type.isEpisodeBased()

[Luna712]

I will have to double check this, but if we want to refactor this I would suggest the viewmodel to decide if it is episode based, because it has additional context like is EpisodeResponse.

cloudstream/library/src/commonMain/kotlin/com/lagradost/cloudstream3/MainAPI.kt

Line 1320 in 9c31d0a

return this is EpisodeResponse && this.type.isEpisodeBased()

Only LoadResponse version has is EpisodeResponse. I did it like this, at least at the moment just so it kept the exact same behavior as before but I can change it if you want?