Document the meaing of `peer` in the package-lock.json documentation.

I am currently trying to diagnose why a package-lock.json is being changed - the behaviour appears to be different between versions 10 and 11 of npm.

On version 11 of npm I see diffs that look like this:

     "node_modules/@aws-amplify/core": {
       "version": "6.13.0",
       "license": "Apache-2.0",
+      "peer": true,
       "dependencies": {

I can not ascertain the meaning of this property.

It is not documented here:

https://docs.npmjs.com/cli/v11/configuring-npm/package-lock-json#packages

I do see this line

bin, license, engines, dependencies, optionalDependencies: fields from package.json

This seems like an incomplete list, for example I can see diffs that mention cpu and os

+    "node_modules/@parcel/watcher-android-arm64": {
       "version": "2.4.1",
+      "resolved": "https://registry.npmjs.org/@parcel/watcher-android-arm64/-/watcher-android-arm64-2.4.1.tgz",
+      "integrity": "sha512-LOi/WTbbh3aTn2RYddrO8pnapixAziFl6SMxHM69r3tvdSm94JtCenaKgk1GRg5FJ5wpMCpHeW+7yqPlvZv7kg==",
+      "cpu": [
+        "arm64"
+      ],
       "dev": true,
       "license": "MIT",
       "optional": true,
-      "dependencies": {
-        "detect-libc": "^1.0.3",
-        "is-glob": "^4.0.3",
-        "micromatch": "^4.0.5",
-        "node-addon-api": "^7.0.0"
-      },
+      "os": [
+        "android"
+      ],

However - I assume that these properties come from package.json : see: https://docs.npmjs.com/cli/v11/configuring-npm/package-json#os

There is no such property peer on package.json - so I'm still at a loss to what it means.

Start with the package-lock.json documentation's packages section and compare it with the linked package.json os documentation. Determine and document what the npm v11 peer field means, and clarify which fields such as cpu and os can appear in lockfile package entries; done when the observed entries are explained in the documentation.