feat(cksum): implement --debug flag with CPU hardware capability detection
- Add --debug flag to cksum for displaying CPU hardware capabilities
- Implement CPU feature detection for x86 (32-bit and 64-bit), aarch64, and loongarch64
- Add target-specific cpufeatures dependency (excluded on Android)
- Add comprehensive benchmarks for cksum performance
- Add CPU debug info printing with proper Android exclusion
- Update localization strings for new --debug flag
- Add test fixtures for crc32b algorithm validation