Add preferUnplugged: true to package.json (#15169)

changelog_unreleased/api/15169.md

@@ -0,0 +1,3 @@
+#### Add `preferUnplugged: true` to `package.json` (#15169 by @fisker and @so1ve)
+
+Prettier v3 uses dynamic imports, user [will need to unplug Prettier](https://github.com/yarnpkg/berry/pull/5411#issuecomment-1523502224) when Yarn's PnP mode is enabled, add [`preferUnplugged: true`](https://yarnpkg.com/configuration/manifest#preferUnplugged) to `package.json`, so Yarn will install Prettier as unplug by default.

package.json

@@ -205,5 +205,6 @@
     "not safari 5.1",
     "not op_mini all"
   ],
+  "preferUnplugged": true,
   "packageManager": "yarn@3.6.3"
 }

scripts/build/build-package-json.js

@@ -17,6 +17,7 @@ const keysToKeep = [
   "exports",
   "engines",
   "files",
+  "preferUnplugged",
 ];
 
 async function buildPackageJson({ file, files }) {