Move `create-next-app` public/ assets from local folder→ remote URL (#66931)
To reduce the number of files cloned during `create-next-app`, this PR
shifts the SVG assets placed in the `public/` folder to instead by
consumed from the Next.js site.
Since these are SVG files (vector images), the Image component does
_not_ optimize them with image optimization. Image optimization only
applies to raster images (like `.png` or `.jpg`). This means it's
effectively similar to using the `unoptimized` prop on the `Image`
component, which means you don't need to add `remotePatterns` to
`next.config.js` – which would be midly annoying for the
`create-next-app` starter.
I also renamed `file-text.svg` to `file.svg` so the URL is shorter.
These assets will be live on .org any minute now.