Automatic gathering of used files for `zip`

Feature Request

I added the extension as a child to another project, kind of like a monorepo. The problem is that when I zip for Firefox it only includes the source files for the extension, but not files that the extension imports from the parent (or sibling) project. A possible way to do this might be; since Vite/Rollup should be aware of which files actually end up in the compiled output, zip could follow the paths and add those files.

Is your feature request related to a bug?

"N/A"

What are the alternatives?

Adding the files manually via defineConfig({ zip: {} }) which is very tedious and doesn't scale.

Additional context

"N/A"