feat: environment specific event handlers

[HigherOrderLogic]

🔗 Linked issue

#1849

❓ 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

(updated by @pi0) This PR adds support for the environment-specific event handler filtering.

The conditions can be specified via filenames with .dev, .prod or .prerender or programmatically via env: [] option.

The default conditions to match are dev, prod, prerender or preset name this way we can make event handlers that only work in specific preset only.

--

Add the ablity to exclude a routes in production build by adding the .dev suffix.

I'm not sure if this should also apply to middlewares too.

📝 Checklist

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

[pi0]

Thanks!