Warren b102917644 Implement T.4 MH (Modified Huffman) encoder ...

- encoder/mh.rs: Full T.4 Group 3 MH encoding implementation
- Uses ITU-T T.4 standard Huffman tables for white/black runs
- Adds EOL codes and RTC (6 EOLs) at document end
- Class2Send now encodes pixels to MH before transmission
- CLI convert command shows MH encoded size

Test result: 467KB raw pixels → 14.6KB MH encoded (~32:1 compression)

2026-07-01 18:12:57 +08:00

7.2 KiB

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