feat(b2sum): add Blake2b checksum utility #10225
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naoNao89
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Implement standalone b2sum utility with Blake2b hashing support. Supports customizable digest lengths (8-512 bits), --length, --tag, --check, --binary, and --text options. Includes comprehensive tests and bilingual localization (English/French).
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a standalone b2sum utility that works just like GNU's version.
The utility supports Blake2b hashing with customizable digest lengths, BSD-style output formatting, and full checksum verification.
I pulled 29 test cases to make sure everything matches their behavior exactly. The code delegates to the existing hashsum infrastructure, which keeps things clean and reusable.
This is just the first PR - Blake2s and the parallel variants come next.