feat(server): add compression support for production server

[Jack-sh1]

Summary

Add gzip/br/deflate compression middleware for the production server via server.compression config option.

This allows developers to enable response compression without relying on a reverse proxy like nginx.

Usage:

// modern.config.ts

export default defineConfig({

  server: {

    compression: true, // gzip by default

    // or: compression: { encoding: 'br' }

  },

});


## Related Links

Closes #6920

## Checklist

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- [ ] I have added changeset via `pnpm run change`.
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- [ x] I have added tests to cover my changes.

[changeset-bot]

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Latest commit: 16769ee

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