fix(release): add crates.io metadata and supported macOS runner

[Lythaeon]

Summary

• add required crates.io package metadata to Cargo.toml (description, readme, repository, homepage, documentation, keywords, categories)
• expand crate categories beyond command-line-utilities with network-programming and asynchronous
• update release build matrix macOS Intel runner label from macos-13 to macos-14 to avoid unsupported runner errors

Risk Notes / Regressions Considered

• metadata-only changes do not alter runtime behavior
• release workflow change only affects runner scheduling for macOS Intel build job
• no execution-path, networking, or strategy logic modifications

Validation Performed

• cargo make test (70/70 passing)