v0.2.0 — pre-commit hook + pipx install

Added

• pre-commit hook: repos: [repo: https://github.com/ruslanlap/skill-vet, hooks: [id: skill-vet]] — scans staged text files on every commit.
• Installable: pipx install git+https://github.com/ruslanlap/skill-vet → skillvet command (single stdlib-only module, zero deps).
• Multi-target CLI: skillvet dir1/ dir2/ file.md — findings merged; .skillvet.yml allowlist is now discovered up the directory tree (nearest wins), so monorepos can have per-skill policies.
• 21 tests green; CI + release verified.