docs(tasks): use server/ dir

[geromegrignon]

🔗 Linked issue

❓ Type of change

• 📖 Documentation (updates to the documentation, readme, or JSdoc annotations)
• 🐞 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)
• 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

The current Tasks documentation includes a specific Nuxt note requiring the tasks folder to be in the server one (https://nitro.unjs.io/guide/tasks#define-tasks).
However, it's also required for a standalone Nitro application in its current state, making this note outdated and needing to update all path mentions to include server.

📝 Checklist

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

[pi0]

Thanks! (i think there are other places we have to update with server/ prefix) -- because in starter template we default srcDir to server

[geromegrignon]

@pi0 I will add new commits to update the whole documentation.

[pi0]

Thanks dear @geromegrignon it would be of great help for docs consistency! Would you like me to wait to push on same PR?

[geromegrignon]

@pi0 sure, I converted it to draft meanwhile.