docs: restore Star History chart with working endpoint

[Dessalines39394]

The Star History chart was removed in f39d798 because it was not rendering. The root cause is that the chart depended on the old star-history.com endpoint, which is broken by GitHub stargazer API restrictions. This PR restores the section with a working endpoint so the chart renders again.

Summary by CodeRabbit

• Documentation
  • Added a responsive, theme-aware Star History chart to the README.
  • The chart links directly to the project repository.

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[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 586cfdb6-4912-4c6d-8b70-11272cfaf192

📥 Commits

Reviewing files that changed from the base of the PR and between d5d287d and 1d7bee0.

📒 Files selected for processing (1)

• README.md

Included review availability: Your plan includes up to 10 reviews per rolling hour; 9 remain after this review.

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📝 Walkthrough

Walkthrough

README.md adds a responsive Star History chart with light and dark theme support.

Changes

README Star History

Layer / File(s)	Summary
Add Star History section README.md	Adds a Star History section with responsive <picture> sources for light and dark themes. The chart links to the project repository.

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

Merge Risk: ⚪ Minimal · up to 1d7be

This is a localized README-only change restoring the Star History chart with an updated endpoint; no actionable merge-blocking risk remains after normal checks and review.

Suggested reviewers: anmolsaini16

🚥 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 identifies the restored Star History chart and the updated working endpoint.
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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