Detect imports across workspace packages in a monorepo

[tasercake]

I have a monorepo with 2 packages foo and bar.
bar/index.js imports from foo/lib.js, but knip flags foo/lib.js as unused.

Repro: https://github.com/tasercake/knip-workspace-bug

$ yarn
$ yarn knip
 yarn run v1.22.19
 $ /Users/krishna/Documents/hypotenuse/knip-workspace-bug/node_modules/.bin/knip
 Unused files (1)
 foo/lib.js
 error Command failed with exit code 1.
 info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

I would expect foo/lib.js to not be flagged as unused because it's imported & used in bar/index.js

Looked around at previous issues but I'm not sure any of them cover my exact problem. #140 (comment) seems to suggest that knip should be aware of imports across packages.

I'm using yarn v1.22.19 (classic) and set up the monorepo according to the classic instructions. To check if that might be the root cause I tried porting the repo over to modern yarn (v3.6.3): https://github.com/tasercake/knip-workspace-bug/tree/yarn-modern, but I get the same output from knip

[webpro]

Sounds like a duplicate of #244, let's track it over there :)