Media: Opus, Ogg, MP4 and Matroska come from craft-libs (#2047)

DeckCraft kept its own Opus decoder (crates/opus) and Ogg demuxer
(crates/ogg), and two crates that only re-exported craft-media
(crates/isobmff, crates/matroska). craft-libs has all four: craft-audio's
opus module and craft-media's ogg, isobmff and matroska modules. The four
crates are removed and crates/media depends on craft-audio and craft-media
directly.

craft-media and craft-audio are pinned at 113f2360, the head of craft-libs
#810, which carries the two Ogg fixes DeckCraft made to its own copy
(51d19baa, 9d36b593). The pin moves to craft-libs main once #810 merges.
craft-pdf, craft-update and craft-ui keep their pins.

One API difference: craft-media's OpusTiming::of saturates on a hostile
granule position instead of returning an error. The end-trim product in
the Ogg Opus decode now saturates as well; a test with a three-channel
file and the largest granule panicked on it without that.

crates/bitstream stays: it also holds the video decoders' memory budget,
which craft-libs does not have.

NOTICE

@@ -76,8 +76,9 @@ Code dependencies
 - symphonia (audio decoding for MP3, AAC, ALAC, FLAC, Vorbis, WAV, AIFF, CAF) is used unmodified
   under the Mozilla Public License 2.0; its source is available at
   https://github.com/pdeljanov/Symphonia.
-- The H.264, HEVC, VP9, AV1, Opus, MP4, Matroska and Ogg crates under crates/ are ported from
-  FilmCraft (same owner, MIT OR Apache-2.0).
+- The H.264, HEVC, VP9 and AV1 crates under crates/ are ported from FilmCraft (same owner,
+  MIT OR Apache-2.0). The Opus decoder (craft-audio) and the MP4, Matroska and Ogg demuxers
+  (craft-media) come from craft-libs (same owner, MIT OR Apache-2.0).
 
 - Krilla 0.8.2 (https://github.com/LaurenzV/krilla) is used through craft-pdf under
   MIT OR Apache-2.0. craft-libs vendors that version with page/surface unwind recovery