docs: upgrade to Rspress V2 new UI

[SoonIter]

Summary

docs: upgrade to Rspress V2 new UI

Related links

Checklist

• [ ] Tests updated (or not required).
• [ ] Documentation updated (or not required).

[netlify[bot]]

✅ Deploy Preview for rspack ready!

Name	Link
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[github-actions[bot]]

📦 Binary Size-limit

Comparing 522e13d to ci(native-watcher): test multiple platforms (#12197) by Hana

🙈 Size remains the same at 47.45MB

[codspeed-hq[bot]]

CodSpeed Performance Report

Merging #12201 will not alter performance

_{Comparing syt/upgrade-v2 (522e13d) with main (a85877a)}

Summary

✅ 17 untouched

[SoonIter]

@copilot 帮我把这个 Pr 的 rspress 相关版本改为 2.0.0-rc.0

[Copilot]

@SoonIter I've opened a new pull request, #12204, to work on those changes. Once the pull request is ready, I'll request review from you.

[CLAassistant]

All committers have signed the CLA.

[chenjiahan]

Could we center the content horizontally when sidebar is hidden? (https://deploy-preview-12201--rspack.netlify.app/blog/)

[SoonIter]

Could we center the content horizontally when sidebar is hidden? (deploy-preview-12201--rspack.netlify.app/blog)

done by simulating centering effect

[chenjiahan]

🎉