chore: ignore .specify/feature.json

[dgarros]

Summary

Keeps the local SpecKit feature-tracking file out of version control so it no longer shows up as noise in git status or risks being committed accidentally.

Key Changes

• .specify/feature.json is now git-ignored, alongside the existing .specify/**/.cache/ entry in the SpecKit section of .gitignore.

Test Plan

• git check-ignore .specify/feature.json returns the path (confirming it is ignored).
• No functional or CI impact.

---

Summary by cubic

Ignore .specify/feature.json in Git to keep the local SpecKit feature-tracking file out of version control. Reduces git status noise and prevents accidental commits.

^{Written for commit 942716d. Summary will update on new commits.}

[cubic-dev-ai]

No issues found across 1 file

_{Re-trigger cubic}