feat: support ASTC texture decode

[liuxinyumocn]

Support ASTC texture decode, and there is a default solution for decoding failure.

[nesrak1]

I can accept it for now, but I plan to use AssetRipper's TextureDecoder library (the mafaca decoders like the one you used but all of them in one place) in the future and make it a nuget package.

[liuxinyumocn]

AssetRipper's TextureDecoder library and mafaca decoders are both good, but they do not support decoding HDR. The best way is to use the dynamic link library, which is written through c++.

[nesrak1]

Having multiple options for managed/unmanaged decoding is the plan, where you can use a fast and more featureful native but less xplat library or a slower more xplat version. Nothing has been written for it though, just planned.

[liuxinyumocn]

Thank you very much.

[nesrak1]

AssetRipper TextureDecoder is in the Texture project now.