Fix package resolving failure in CLI

[msujew]

What it does

With the introduction of ESM modules, a lot of packages have started to utilize the exports field of the package.json file. This came with a change in the require.resolve function which automatically tried to resolve the default export of package.json, preventing us to actually get the path to the package.json file. For more information see here.

The package resolve-package-path simulates the node.js package resolving algorithm and prevents the Failed to resolve module warning to appear which confuses a lot of developers (see #11822 for example).

How to test

1. Run the theia build command
2. Assert that no Failed to resolve module warning is printed to the console.

Review checklist

• As an author, I have thoroughly tested my changes and carefully followed the review guidelines

Reminder for reviewers

• As a reviewer, I agree to behave in accordance with the review guidelines

[vince-fugnitto]

The changes work well for me 👍