Add back format-js with a deprecation note

package.json

@@ -230,6 +230,7 @@
 		"fixtures:generate": "cross-env GENERATE_MISSING_FIXTURES=y npm run test-unit",
 		"fixtures:regenerate": "npm run fixtures:clean && npm run fixtures:generate",
 		"format": "wp-scripts format",
+		"format-js": "wp-scripts format-js",
 		"format-php": "wp-env run composer run-script format",
 		"lint": "concurrently \"npm run lint-lockfile\" \"npm run lint-js\" \"npm run lint-pkg-json\" \"npm run lint-css\"",
 		"lint-js": "wp-scripts lint-js",

packages/scripts/scripts/format-js.js

@@ -0,0 +1,36 @@
+/**
+ * External dependencies
+ */
+const chalk = require( 'chalk' );
+
+/**
+ * Internal dependencies
+ */
+const { getNodeArgsFromCLI, spawnScript } = require( '../utils' );
+
+const { scriptArgs, nodeArgs } = getNodeArgsFromCLI();
+
+const keypress = async () => {
+	process.stdin.setRawMode( true );
+	return new Promise( ( resolve ) =>
+		process.stdin.once( 'data', () => {
+			process.stdin.setRawMode( false );
+			resolve();
+		} )
+	);
+};
+
+( async () => {
+	const message =
+		`Please note that the ${ chalk.red(
+			'format-js'
+		) } script has been renamed to ${ chalk.green( 'format' ) }.\n` +
+		"If you're calling it from any of your own scripts, please update them accordingly.\n" +
+		'Press any key to continiue.';
+
+	// eslint-disable-next-line no-console
+	console.log( message );
+
+	await keypress();
+	spawnScript( 'format', scriptArgs, nodeArgs );
+} )();