dav1dplay: handle all supported csps/reprs/bitdepths
dav1dplay: handle all supported csps/reprs/bitdepths

Generalize the code to set the right pl_image metadata based on the
values signaled in the Dav1dPictureParameters / Dav1dSequenceHeader.

Some values are not mapped, in which case stdout will be spammed.
Whatever. Hopefully somebody sees that error spam and opens a bug report
for libplacebo to implement it.

videolan/dav1d