chore(deps): make better-sqlite3 dependency optional

[dannote]

🔗 Linked issue

Resolves #3346

❓ Type of change

• 📖 Documentation (updates to the documentation or readme)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

Make better-sqlite3 optional to prevent native‐build failures (e.g. in Bun Docker):

• Move better-sqlite3 into peerDependencies (marked optional)
• Add runtime checks so it’s only required when actually used

📝 Checklist

• I have linked an issue or discussion.
• I have updated the documentation accordingly.

[pkg-pr-new]

npm i https://pkg.pr.new/@nuxt/content@3349

commit: e217012

[farnabaz]

Thanks for the PR
Could you merge main into your PR and update the installation docs for each environment? https://content.nuxt.com/docs/getting-started/installation

It would be nice also to have a message to note about moving better-sqlite as an optional dependency.

Ideally, I would be happy if we could prompt the user and ask her permission to install better-sqlite automatically. Just like what Nuxt does for @nuxt/image module if it's missing.

• https://github.com/nuxt/nuxt/blob/76b300eddae6d755948239c305bfcc587dd74197/packages/nuxt/src/components/plugins/loader.ts#L58-L65
• https://github.com/nuxt/nuxt/blob/76b300eddae6d755948239c305bfcc587dd74197/packages/nuxt/src/core/features.ts