docs: add FAQs section (#252)

[shinGangan]

🔗 Issues

closed #251 . related https://github.com/orgs/honojs/discussions/2246

🙋 Description

This PR is the following supported.

• add FAQs section
• add Renovate config to FAQs section

☑️ Checklist

• [x] linked an issue or discussion
• [x] add sidebar items
• [ ] add tests

📗 Note

• shinGangan/renovate-config-hono

[shinGangan]

Hi @yusukebe .

It is not a high priority. We would appreciate a review when you have a time. 🙏

[yusukebe]

@shinGangan

Thanks! Looks good! Merging now.