[P3-T04] Release v0.4.0 to npm + GitHub

[firatcand]

Forge task ID: P3-T04
Phase: 3 — Launch v0.4 · Type: infra · Owner: devops-engineer · Priority: P0 · Estimate: S
Depends on: P3-T01, P3-T02, P3-T03

Cut release: bump package.json to 0.4.0, tag v0.4.0, npm publish --access public, create GitHub release with CHANGELOG excerpt + migration note. Verify install via npx @firatcand/forge --version pulls v0.4.0.

v0.4.0 ships the closed-loop drift workflow as the headline change:

• Ephemeral ADRs (spec/decisions/<slug>.md deleted after /update-spec --apply; rationale in commit message)
• /update-spec --draft + /update-spec --apply skill
• /amend-roadmap for mid-flight new tasks
• /reconcile for bi-directional phases.yaml ↔ tracker sync
• forge orchestrate worktree-drift-guard with --dry-run

README + CHANGELOG updated with the simplified verb taxonomy (next removed; suggest-next/session-check/intent-detect never shipped).

Acceptance:

• git tag v0.4.0 pushed
• npm publish succeeds; latest tag points to 0.4.0
• GitHub release with CHANGELOG body + closed-loop workflow callout
• npx @firatcand/forge --version on a fresh machine returns 0.4.0
• Maintainer dogfood sign-off: ran v0.4.0 against a non-forge personal project; shipped at least one task end-to-end including a mid-flight /update-spec --draft + --apply propagation