Add new pnpm configuration (#5638)

Co-authored-by: btea <btea@users.noreply.github.com>

Author: btea

src/schemas/json/pnpm-workspace.json

@@ -867,6 +867,31 @@
     "virtualStoreOnly": {
       "description": "When set to true, pnpm populates the virtual store without creating importer symlinks, hoisting, bin links, or running lifecycle scripts. This is useful for pre-populating a store (e.g., in Nix builds) without creating unnecessary project-level artifacts. pnpm fetch uses this mode internally.",
       "type": "boolean"
+    },
+    "pmOnFail": {
+      "description": "Overrides the `onFail` behavior of both the `packageManager` field and `devEngines.packageManager` when the running pnpm version does not match the declared one.",
+      "oneOf": [
+        {
+          "type": "string",
+          "enum": ["download", "error", "warn", "ignore"]
+        }
+      ]
+    },
+    "runtimeOnFail": {
+      "description": "Overrides the `onFail` field of `devEngines.runtime` (and `engines.runtime`) in the root project's `package.json`. This is useful when you want a different local behavior than what is written in the manifest — for instance, forcing pnpm to download the declared runtime even when the manifest sets `onFail: \"warn\"`.",
+      "oneOf": [
+        {
+          "type": "string",
+          "enum": ["download", "error", "warn", "ignore"]
+        }
+      ]
+    },
+    "nodeDownloadMirrors": {
+      "description": "Configure custom Node.js download mirrors in `pnpm-workspace.yaml`. The keys are release channels (`release`, `rc`, `nightly`, `v8-canary`, etc.) and the values are base URLs.",
+      "type": "object",
+      "additionalProperties": {
+        "type": "string"
+      }
     }
   },
   "additionalProperties": false