Include style/script - feature support

MD interpolation support including other MD files or partials of it {{#include /path/to/file.md}}.
will it be possible to also support script and styles
which might not be present in deployment

note that supporting local assets can get a little complex when the assets are not present in deployment. for example there could be built assets or that assets depend on 3rd (node_modules). so if the feature request is applicable, could we consider compiling these assets to the book build?