Added stylelint as a dependency using Yarn

.gitignore

@@ -3,3 +3,4 @@ cache/
 
 /vendor/
 composer.lock
+node_modules

package.json

@@ -0,0 +1,14 @@
+{
+  "name": "admin-panel",
+  "version": "1.0.0",
+  "main": "none",
+  "repository": "git@gitlab.com:delta-wings/adminpanel.git",
+  "author": "Avior <florian.bouillon@delta-wings.net>",
+  "license": "MIT",
+  "private": false,
+  "devDependencies": {
+    "stylelint": "^9.10.1",
+    "stylelint-config-recommended": "^2.1.0",
+    "stylelint-config-standard": "^18.2.0"
+  }
+}