Add Jekyll GitHub Pages deployment workflow

[hrygo]

This workflow builds and deploys a Jekyll site to GitHub Pages, with steps for checkout, setup, build, and deployment.

添加 github pages

Closes #21

[github-actions]

⚠️ Missing Issue Reference

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Please add one of the following issue references in your PR description or title:

• Closes #123 - when the PR fully resolves the issue
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## Summary
Add new feature for...

## Related Issue
Closes #123