v0.3.0 — citation checks, --strict-sources, --version

Added

• Assertion citations are now checked. Every assertion's source
  ("CLAUDE.md#L42") is a claim about the repo like any other, and it rots
  the same way: insert a paragraph and every line number below it shifts
  while the assertions keep passing against the wrong sentence. groundtruth check now verifies that the cited lines still state the claim, and reports
  where the sentence moved to when they do not. Running it against this
  repository for the first time found 9 of its own 15 citations already
  wrong.
• --strict-sources turns those warnings into a non-zero exit. Off by
  default: a stale citation is a bug in your assertions file, not drift in
  the repo it describes, so upgrading never newly breaks a build.
• --version / -v, which the bug-report template had been asking for
  without anything to answer it.
• sourceWarnings in --json output, and in the Action's job log and job
  summary.

Changed

• Unrecognised arguments are now a usage error (exit 2) instead of being
  silently ignored, and a flag missing its value is too. --jsonn used to
  print a table and exit 0 — a green build from a run that never did what
  was asked, which is the exact failure this tool exists to prevent.

Fixed

• The version input and pinned Action refs in README.md still said
  0.2.0 after the 0.2.1 release. CI now checks package.json,
  action.yml, and README.md agree on the version.
• The npm package page linked to the old jaystewart-dev/groundtruth
  repository, so its README badges all read "repo not found". The package
  metadata and README now point at jaystewartuk/groundtruth.
• The assertion-kind count read "6" in the README, the shipped example file,
  the FAQ, and the glossary; there have been seven kinds since
  text_matches_across landed.

v0.2.1 — on the GitHub Marketplace

No behaviour change: @groundtruth-sh/cli@0.2.1 on npm is functionally identical to 0.2.0, and the Action's runner is untouched. This release exists so the Action can be published to the GitHub Marketplace — the listing takes its name, description and icon from action.yml.

- uses: actions/checkout@v4
- uses: jaystewartuk/groundtruth@v0.2.1

Pin the exact ref — there is no floating v0 major alias while pre-1.0.

See the changelog for 0.1.0 and 0.2.0.