Scan link dependencies with the Pnpm detector

[jcfiorenzano]

The pnpm-lock.ymal file can have entries that refer to modules that are present in the file system ex:

  /query-string/4.3.4:
    dependencies:
      '@learningclient/common': link:../common

Resolving this path should take us to a folder with a package.json file. We could parse this file to get the version of the component.
Today the component is not registered by the PnpmDetector but by the NpmDetector. This is a little inconvenient because the NpmDetector cannot create a dependency graph for this component and does not have information if the component is a dev dependency or not.