- Add comprehensive benchmarks for all 17 SUPPORTED_ALGORITHMS
- Include custom SHAKE algorithm benchmarks using direct digest calculation
- Add CI integration with benchmark workflow
- No core cksum logic modifications to avoid merge conflicts

- Split bench_shake_algorithm macro into separate patterns for Shake128 and Shake256
- Only import the specific SHAKE type that is used in each macro invocation
- Resolves CI compilation errors due to unused import warnings

- Use length as parameter instead of hardcoded values
- Add algorithm-specific lengths for each algorithm (224, 256, 384, 512 bits)
- Resolves benchmarks running too fast (<500µs) due to invalid length parameters
- All algorithms now produce meaningful hash outputs with proper timing

SHA224, SHA256, SHA384, and SHA512 algorithms don't support the --length
parameter since the length is implicit in their algorithm names. Only the
generic sha2 and sha3 algorithms require explicit length specification.