fix: restore broken star history chart in README

[PingouinFerreux]

The star history chart in the README is currently broken because the underlying service is affected by GitHub stargazer API restrictions and no longer renders. This PR switches the chart to a working alternative, so the development history of the project is visible again.

Summary by CodeRabbit

• Documentation
  • Updated Star History links in the README to use the new star-history.dera.page URLs.

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[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 48e93caa-c639-451d-8a3d-1fb119c04f0b

📥 Commits

Reviewing files that changed from the base of the PR and between 1db40fe and 5951a2f.

📒 Files selected for processing (1)

• README.md

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📝 Walkthrough

Walkthrough

The README Star History section now uses star-history.dera.page URLs for its link and chart images. Dark and light theme variants remain unchanged.

Changes

Star History documentation

Layer / File(s)	Summary
Update Star History URLs README.md	The Star History link and chart image sources now use star-history.dera.page. Existing theme variants and chart attributes remain unchanged.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Mergeability Score: ⚪ Minimal · up to 5951a

This localized README change restores the star history chart without introducing an actionable merge-blocking risk; it is merge-ready after normal checks and review.

Suggested reviewers: danditomaso

Poem

A rabbit hopped through links so bright,
And changed the stars to newer light.
Dark charts stayed, and light ones too,
With fresh page paths in every view.
“Hop approved!” the bunny chewed.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The description explains the problem and solution but omits the required Changes Made, Testing Done, and Checklist sections.	Add the required template sections and document the changes, testing performed, related issues, screenshots if applicable, and checklist status.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies the README star history chart fix, which matches the main change in the pull request.
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.

✨ Finishing Touches 💡 1

🛠️ Fix failing CI checks 💡

• Create stacked PR
• Commit on current branch

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