Build Tools: Configure prettier properly.

Allows tools like prettier or VSCode to auto-format JS files propertly.
It pulls the prettier config that is used in the Gutenberg repository.

Props gziolo.
Fixes #60316.

git-svn-id: https://develop.svn.wordpress.org/trunk@57330 602fd350-edb4-49c9-b593-d223f7449a82

.prettierrc.js

@@ -0,0 +1,3 @@
+// Import the default config file and expose it in the project root.
+// Useful for editor integrations.
+module.exports = require( '@wordpress/prettier-config' );

package.json

@@ -31,6 +31,7 @@
 		"@wordpress/dependency-extraction-webpack-plugin": "4.25.13",
 		"@wordpress/e2e-test-utils": "10.13.13",
 		"@wordpress/e2e-test-utils-playwright": "0.10.13",
+		"@wordpress/prettier-config": "2.25.13",
 		"@wordpress/scripts": "26.13.13",
 		"autoprefixer": "10.4.16",
 		"chalk": "5.3.0",