docs: world-class README badges (npm, coverage, provenance)

[saucam]

Upgrades the header badges now that codeoid ships as a published, provenance-signed, coverage-tracked package:

• npm version → v0.1.1 (live)
• npm downloads (monthly)
• CI (kept)
• Codecov coverage → renders 81%
• published with provenance (OIDC Trusted Publishing)
• License: MIT · Runtime: Bun · TypeScript · PRs welcome

All badge URLs verified to resolve with real values (npm v0.1.1, Codecov 81%).

🤖 Generated with Claude Code

Summary by CodeRabbit

• Documentation
  • Updated the README badges row to add npm version, npm downloads, code coverage, and provenance, and removed the prior “PRs welcome” badge.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro Plus

Run ID: dfc79551-ce69-4772-8373-4039f69e8af4

📥 Commits

Reviewing files that changed from the base of the PR and between 334f5c8 and 916b121.

📒 Files selected for processing (1)

• README.md

✅ Files skipped from review due to trivial changes (1)

• README.md

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📝 Walkthrough

Walkthrough

The README header badge row is updated to include four new Markdown badge links for npm version, npm downloads, codecov coverage, and published-with-provenance status. The "PRs welcome" badge is removed. Existing CI, MIT license, and Bun runtime badges are retained.

Changes

README Badge Updates

Layer / File(s)	Summary
README badge row expansion README.md	Adds npm version, npm downloads, codecov, and published-with-provenance badges to the existing top-of-file badge section; removes "PRs welcome" badge.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and specifically summarizes the main change: adding world-class README badges for npm, coverage, and provenance metadata.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch docs/readme-badges

---

_{Comment @coderabbitai help to get the list of available commands.}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.61%. Comparing base (35fd681) to head (916b121).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #27   +/-   ##
=======================================
  Coverage   80.61%   80.61%           
=======================================
  Files          45       45           
  Lines        4782     4782           
=======================================
  Hits         3855     3855           
  Misses        927      927           

Flag	Coverage Δ
daemon	80.61% <ø> (ø)

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