Harry Bayliss
83eb4f6b2d
Switches CLI flag parsing from Go's stdlib `flag` to spf13/pflag so `--project` (and the internal `--socket` / `--identity` / `--scenario` flags) are the only accepted form; single-hyphen long flags like `-project` are now rejected. Help output renders the canonical `--` form. Adds `patterm --version`, which prints the build version, short commit, and build date (e.g. `patterm v0.0.1 (commit abc1234, built 2026-05-14)`). The version string is injected at build time — `make patterm` derives it from `git describe --tags --always --dirty`, and the release workflow injects the pushed tag. Commit/date come from the Go toolchain's embedded VCS info via `runtime/debug.ReadBuildInfo`, so no manual bumping is required.