Ensure linting is done for email editor JS and CSS files

MAILPOET-6215

.husky/pre-commit

@@ -4,3 +4,4 @@
 
 npx lint-staged -c mailpoet/package.json --cwd mailpoet
 npx lint-staged -c package.json
+npx lint-staged -c packages/js/email-editor/package.json --cwd packages/js/email-editor

mailpoet/RoboFile.php

@@ -683,11 +683,21 @@ class RoboFile extends \Robo\Tasks {
   }
 
   public function qaLintJavascript() {
-    return $this->_exec('pnpm run check-types && pnpm run lint');
+    $collection = $this->collectionBuilder();
+    return $collection->taskExecStack()
+      ->stopOnFail()
+      ->exec('pnpm run check-types && pnpm run lint')
+      ->exec('cd .. && cd packages/js/email-editor && pnpm run lint:js')
+      ->run();
   }
 
   public function qaLintCss() {
-    return $this->_exec('pnpm run stylelint-check -- "assets/css/src/**/*.scss"');
+    $collection = $this->collectionBuilder();
+    return $collection->taskExecStack()
+      ->stopOnFail()
+      ->exec('pnpm run stylelint-check -- "assets/css/src/**/*.scss"')
+      ->exec('cd .. && cd packages/js/email-editor && pnpm run lint:css')
+      ->run();
   }
 
   public function qaCodeSniffer(array $filesToCheck, $opts = ['severity' => 'all']) {

packages/js/email-editor/package.json

@@ -14,6 +14,10 @@
 		"lint:js": "wp-scripts lint-js ./src/**",
 		"lint:js-fix": "wp-scripts lint-js ./src/** --fix"
 	},
+	"lint-staged": {
+		"*.{scss,css}": "wp-scripts lint-style",
+		"*.{js,jsx,ts,tsx}": "wp-scripts lint-js ./src/**"
+	},
 	"dependencies": {
 		"@wordpress/api-fetch": "^7.0.0",
 		"@wordpress/block-editor": "^13.0.0",