Add a testing solution (unit, e2e, etc.)

[ahkhanjani]

Describe the feature you'd like to request

I could not figure out how to add a testing solution (Vitest is what I choose for unit tests) that works well with this monorepo. Detecting paths on Windows and being able to resolve namespace imports (@acme/package) were some of the problems I encountered. You guys may have more experience doing this.

Describe the solution you'd like to see

I would like to have a testing solution with the monorepo by default, preferably as a package to be easy to opt-out. I tried creating tooling/testing package and adding my Vitest configs (Node and React separately) there and extending the root vitest.workspace.ts using them.

Note that I also tried using Node's built-in testing library which I would definitely prefer over a third party library. Unfortunately even using glob package to find paths failed me for some unknown reason. Probably a Windows issue.

Additional information

No response