Add support for BDMV movie directories in native playback mode

[YK-Samgo]

Add support for BDMV movies in the bluray directry by pointing the file to ./BDMV/index.bdmv when using direct path
related issue #33

Originally, kodi can't play the movie synced by jellyfin for kodi with Playback mode: Native (direct paths) if the bdmv is in a directry like this:
Casino.Royale.2006.COMPLETE.UHD.BLURAY-COASTER/
.
└── Casino.Royale.2006.COMPLETE.UHD.BLURAY-COASTER
├── BDMV
│   ├── BACKUP
│   ├── BDJO
│   ├── CLIPINF
│   ├── JAR
│   ├── META
│   ├── PLAYLIST
│   ├── STREAM
│   ├── index.bdmv
│   └── MovieObject.bdmv
├── CERTIFICATE
│   ├── BACKUP
│   ├── app.discroot.crt
│   ├── bu.discroot.crt
│   └── id.bdmv
├── Casino.Royale.2006.COMPLETE.UHD.BLURAY-COASTER.nfo
├── fanart.jpg
├── landscape.jpg
├── logo.png
└── poster.jpg

Jellyfin server tells jellyfin for kodi only the directry of the bdmv, in this case, Casino.Royale.2006.COMPLETE.UHD.BLURAY-COASTER, but kodi needs the 'BDMV/index.bdmv' file, which, in this case, should be Casino.Royale.2006.COMPLETE.UHD.BLURAY-COASTER/BDMV/index.bdmv. So just give kodi what it wants.

[sonarcloud]

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[mcarlton00]

Thanks. I don't have any bluray rips so I can't test this myself, but the code itself looks fine

[holow29]

Not sure if you want to do this separately or not, but you might consider doing the same for DVD folders to point to VIDEO_TS.IFO inside VIDEO_TS folder. (Such as /folder/Casino Royale (DVD)/VIDEO_TS/VIDEO_TS.IFO)

[mcarlton00]

I'd suggest doing so separately just so it's easier to track down if we ever need to find it again.

@holow29 if you're able to test this change reasonably soon it'd be super helpful (nobody on the dev team is currently set up for native mode/has raw bluray rips). If you can't then it's not a big deal, I'll merge it anyway. Just having confirmation before merging is always nice 😄

[holow29]

Hmm so I am trying to test (a bit remotely), and I'm having some difficulty because now I am getting something to play, but it is not the correct movie (but always the same incorrect movie). What is happening is similar to before where I click a video tile and the interface seems to reload briefly (maybe then placing the wrong movie under my 'cursor'); the change is that whereas before nothing would play, now something is playing (but the wrong thing, as I said).

[mcarlton00]

Perhaps I've missed something, but I was under the impression that this PR was fixing bluray playback for native mode, and that native mode was only accessible from on the same LAN as your server. So I'm not entirely sure how you could be testing this remotely.

[holow29]

I meant that I am not at my setup at the moment, but others are - so I was trying to remotely walk them through some tests. It's a little difficult this way.