Add support for SAFMN++

[RunDevelopment]

SAFMN recently got updated to include new models. Add support for them.

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Originally reported by @zelenooki87 here:

By the way, I noticed that the safmn GitHub repository has been updated with new models. Could you update the safmn architecture in Spandrel to support them? Thanks!

[zelenooki87]

I tried SAFMN_BCIE in conda environment on real life photos, and while it works well on some, it unfortunately adds artifacts to some other images. But then I tried it on a couple of video clips with extracted frames it gives constantly really nice results for video decompression :) onother model had not tested yet.
I'll wait for spandrel support before testing them in more detail.

[zelenooki87]

[2024-05-06] The lightweight version of SAFMN++ won 1st place in the fidelity track of Real-Time 4K Super-Resolution of Compressed AVIF Images Challenge and was invited to give an oral presentation at the AIS2024 workshop.