Migrate to yarn v4

Use yarn PnP which forces us to install some more explicit dependencies.

Change-Id: Ib35c5c71a37081c98778937bde5a23bf997dd54c

.yarn/sdks/prettier/package.json

@@ -0,0 +1,7 @@
+{
+  "name": "prettier",
+  "version": "3.2.5-sdk",
+  "main": "./index.cjs",
+  "type": "commonjs",
+  "bin": "./bin/prettier.cjs"
+}