`ver-bump` is not on Homebrew

[jv-k]

Status: scheduled for 2.0.0.
Plan: docs/v2.0-release-plan.md § M6 — Homebrew distribution

Summary

Ship ver-bump as a Homebrew-installable package so macOS/Linux users don't need npm, a manual clone, or an install script.

Scope

• Own tap first. New repo jv-k/homebrew-ver-bump with Formula/ver-bump.rb. brew tap jv-k/ver-bump && brew install ver-bump must succeed on a clean machine.
• Formula depends on bash, jq.
• test do block (required by brew audit --strict): at minimum system "#{bin}/ver-bump", "--help".
• CI on the tap repo: brew audit --strict --online on every push + tag.
• Release automation: keep tap url/sha256 in sync when jv-k/ver-bump publishes a new tag (workflow on the main repo pushing to the tap, or tag-triggered workflow on the tap repo itself).
• Main repo README.md: add brew install jv-k/ver-bump/ver-bump as a first-class install path.

Deferred to post-2.0

• homebrew-core submission (needs 30-day stability + adoption).
• basher distribution — tracked separately.

Acceptance

• brew tap jv-k/ver-bump && brew install ver-bump succeeds on a clean macOS runner
• brew audit --strict --online Formula/ver-bump.rb passes
• Tap repo has CI that re-audits on every change
• Main repo README shows brew install path