Add disc title, format, streams to Disc::scan() — move logic from CLI to lib

- Disc.volume_id: UDF Volume ID from PVD (always present)
- Disc.meta_title: from META/DL/bdmt_eng.xml (falls back to other languages)
- Disc.format: UHD/BluRay/DVD detected from video codec
- Disc.capacity_bytes, Disc.layers
- Disc.jar_labels: extracted from BDMV/JAR
- Fixed MPLS STN parsing: 16-byte header (was 8), proper stream entry offsets
- Streams now include: HDR, color space, Dolby Vision EL, secondary audio/video
- parse_dstring() for UDF d-string fields
- wait_ready() polls TEST UNIT READY before unlock

Tested on 12 disc captures — all return correct titles, streams, format.

src/lib.rs

@@ -87,5 +87,5 @@ pub use profile::{DriveProfile, Chipset};
 pub use platform::{Platform, DriveStatus};
 pub use scsi::ScsiTransport;
 pub use speed::DriveSpeed;
-pub use disc::{Disc, Title, Stream, StreamKind, Codec, HdrFormat, ColorSpace,
+pub use disc::{Disc, DiscFormat, Title, Stream, StreamKind, Codec, HdrFormat, ColorSpace,
                Extent, ContentReader, AacsState, KeySource, ScanOptions};