(Contact) extract packument and manifest (pacote)

[fraxken]

The API is focused on the scanner right now, which is fine.
I’d like to add two new method to the ContactExtractor class (in addition to fromDependencies):

1. fromManifest - pull contacts from a manifest
2. fromPackument - pull contacts from a packument

Both inputs come from pacote, so we keep using the npm-types workspace.

These helpers will only extract the raw contacts.
They won’t parse them—that still happens in fromDependencies, which returns a proper Contact (because Scanner already deal with that before hand).

We’ll need parseAuthor from the utils workspace for the final step.

Tip

Doing manifest first and then packument in a separated PR would be better (since packument contains all the manifest of the package).

---

Expected code output would be something like fromDependencies

const manifest = await pacote.manifest("is@x.x.x");

const extractor = new ContactExtractor({
  highlight: [
    {
      name: "Sindre Sorhus"
    }
  ]
});
const contacts = extractor.fromManifest(
  manifest
);

[fraxken]

API break coming with: #487

[clemgbld]

for the manifest fetching to get the full metadata we should add the fullMetadata option (if not we would get only the abbreviated manifest which doesn't contain the author, contributors and maintainers fields):

const manifest = await pacote.manifest("is@x.x.x", {fullMetadata: true});