build: make vscode work with PnP (#2444)

* Make vscode work with PnP

* Add vscode extension recommendations

* Add newlines to the end of generated manifests

.yarn/sdks/stylelint/lib/index.js

@@ -0,0 +1,20 @@
+#!/usr/bin/env node
+
+const {existsSync} = require(`fs`);
+const {createRequire, createRequireFromPath} = require(`module`);
+const {resolve} = require(`path`);
+
+const relPnpApiPath = "../../../../.pnp.js";
+
+const absPnpApiPath = resolve(__dirname, relPnpApiPath);
+const absRequire = (createRequire || createRequireFromPath)(absPnpApiPath);
+
+if (existsSync(absPnpApiPath)) {
+  if (!process.versions.pnp) {
+    // Setup the environment to be able to require stylelint/lib/index.js
+    require(absPnpApiPath).setup();
+  }
+}
+
+// Defer to the real stylelint/lib/index.js your application uses
+module.exports = absRequire(`stylelint/lib/index.js`);