v0.1.2

- Integer radix fast path for global -n
- Transparent gzip/zstd compression
- --date-sort
- --progress bar/ETA
- First release built via .github/workflows/release.yml

Add Cargo.lock

Point Cargo.toml repository at github.com/otl/xort

Aligns the crate's repository metadata with the intended GitHub repo name
(rename pss -> xort done separately in GitHub settings). GitHub redirects
the old URL, so existing remotes keep working.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PdfZcAvgTDRafxA9mcLqQK