"Use with" instructions should also be shown for browser-only libraries

People developing for the browser still use a package manager to install their dependencies, so instructions on how to install something thrown `npm`/`yarn`/etc are also valuable for them.

https://jsr.io/@nic/local-highlight-registry is a library that only works in browsers. However, I had to mark Node.js compatibility as "unknown" rather than "no" to get the instructions to show up.