Added features to load models from .gltf and .glb files.

[Jaemin-VIRNECT]

Added features to load models from .gltf and .glb files. (using GLTFSceneKit)

And examples also added.

[olexale]

Hello @Jaemin-VIRNECT,

Thank you so much for this PR! I'll review it on the weekend and if everything is good publish a new version. Meanwhile, could you please make sure you are not using "print" in the production code and that all files are formatted? Was there a reason to bump the minimum SDK version?

Thanks again!

Kind regards,
Oleksandr

[Jaemin-VIRNECT]

Hello @olexale ,
Thank you for your quick reply and great work.
All dart files have their code formatted according to Android Studio default settings.

I checked my PR again and it seems that my NodeBuilder.swift is using the print().
After a quick review of your code it seems I should have used logPluginError().

If there is a problem with the file format, etc., would you please change it?
(I am a beginner in Swift. :( )

And about the minimum SDK version,
Enum.name requires a minimum SDK version >= 2.15.0 (Android Studio warning).

[olexale]

Thanks again for your PR! I bet many engineers would love to see this functionality. My initial idea was to keep only pure ARKit functionality without any 3rd-party SDKs, but I can admit that many devs would love to be able to use .glb and .gltf files in their projects, so let's add it.

I've added a few comments and propositions to the PR. Please have a look.
I might be able to help you with PR next weekend if you do not make changes before that.

Thanks again for your efforts!

[olexale]

Thanks again, @Jaemin-VIRNECT! I'll make some clean up (unrelated to your changes) in the plugin and release a new version with your contribution soon!

[olexale]

I just pushed version 1.0.7 with your changes. Thanks!

[Jaemin-VIRNECT]

Thank you so much! @olexale