docs: add status badges to README

[unhappychoice]

Summary

• Add 5 status badges (npm / release / CI / codecov / license) to the README, mirroring the gittype README layout.
• Apply the logo's brand colors (#1e3a8a, #0f172a) to the npm and release badges.

Test plan

• Verify the badges render correctly on GitHub.
• Verify each badge links to the expected destination (npm, releases, Actions, Codecov, LICENSE).

🤖 Generated with Claude Code

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 4f3cf854-6cdf-46c4-b64f-74876e40774c

📥 Commits

Reviewing files that changed from the base of the PR and between 79f8c96 and c4404d7.

📒 Files selected for processing (1)

• README.md

✨ Finishing Touches

🧪 Generate unit tests (beta)

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

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.34%. Comparing base (8a7bb12) to head (c4404d7).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #692   +/-   ##
=======================================
  Coverage   99.34%   99.34%           
=======================================
  Files          69       69           
  Lines        1537     1537           
  Branches      364      369    +5     
=======================================
  Hits         1527     1527           
  Misses          9        9           
  Partials        1        1           

Flag	Coverage Δ
frontend	99.33% <ø> (ø)

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