fix: add field filtering based on query parameters for search.json

[arashsheyda]

related to https://github.com/nuxt/devtools/pull/681

[atinux]

I'm not sure this should be here @arashsheyda

As this file is pre-rendered at build time.

[arashsheyda]

@Atinux oh okay, thanks. should I add a filter after fetching the content or would that be unnecessary?

[atinux]

Filter afterward might reduce memory usage yes @arashsheyda