docs: fix broken Star History chart

[OctoBored]

The Star History chart in the README is currently broken because the GitHub stargazer API limits data access. This change points the chart at star-history.dera.page, an alternative that uses a different data source requiring no API token, so the chart renders correctly again.

Summary by CodeRabbit

• Documentation
  • Updated Star History embeds to use the new star-history.dera.page URLs.
  • Replaced outdated Star History and API endpoint references.

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[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Repository UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 5c14c3a1-5f4a-44ac-8c74-5d476a58397d

📥 Commits

Reviewing files that changed from the base of the PR and between 44742c6 and f252108.

📒 Files selected for processing (1)

• README.md

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Walkthrough

The README updates the Star History chart link and light/dark image sources to use star-history.dera.page.

Changes

Star History embed

Layer / File(s)	Summary
Update Star History URLs README.md	The chart link and light/dark image sources now use star-history.dera.page.

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

Poem

A rabbit hops through README bright,
And updates stars with links just right.
New pages guide the chart’s display,
In light and dark, along the way.
“Hop, hop!” the bunny cheers today.

🚥 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 describes the README change that fixes the broken Star History chart.
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

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud