docs: add Star History to English and Chinese READMEs

[cazerme]

Adds a Star History section near the bottom of both English and Chinese READMEs, before License. The chart tracks Waybox-AI/roadtrip-skill, supports light and dark themes, and links to the interactive history page.

Validation:

• .venv/bin/python3 -m pytest tests/ -v: 345 passed, 1 skipped.
• git diff --check: passed.
• Confirmed the real chart loads in a local README-section browser preview.

Summary by CodeRabbit

• Documentation
  • Added a Star History section to the English and Chinese README files.
  • Included a responsive Star History chart with support for light and dark color schemes.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Advanced

Run ID: ed1608f4-8961-4262-8bb2-f11e1a94ed71

📥 Commits

Reviewing files that changed from the base of the PR and between 7965b09 and f3ad338.

📒 Files selected for processing (2)

• README.md
• README.zh.md

Included review availability: Your plan provides up to 2 included reviews per hour; 1 remains after this review.

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📝 Walkthrough

Walkthrough

The English and Chinese README files now include a “Star History” section with a repository star request and theme-aware Star History chart.

Changes

Star History Documentation

Layer / File(s)	Summary
README Star History section README.md, README.zh.md	Adds matching Star History sections in English and Chinese. Each section includes star request text and a responsive chart for dark and light themes.

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

Merge Risk: ⚪ Minimal · up to f3ad3

Both READMEs add bilingual, theme-aware Star History chart sections without changing runtime behavior or application data. No merge-blocking risk remains.

Suggested reviewers: wilhelm-tiger, ziminpan

🚥 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 concisely describes the main change: adding Star History documentation to the English and Chinese README files.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
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

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch codex/readme-star-history

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