What's Changed

• Modernize to clap 4 derive API and edition 2021
• Bump dependencies: friendly_id 0.4, uuid 1
• Refactor error handling: Result instead of process::exit
• Improve CLI: better descriptions, UUID|FRIENDLYID value hint
• Expand test suite from 3 to 7 tests (roundtrip, error paths, uppercase UUID)
• Add GitHub Actions CI (build, test, clippy)
• Modernize RPM spec: remove obsolete directives, SPDX license
• Add strip = true to release profile for smaller binary
• Remove unused clap cargo feature and uuid v4 feature

Create id, when no argument is passed

Initial version