Added linting according to Airbnb JS

The commit adds rules for linting accoring to https://github.com/airbnb/javascript
and reformates to code to adhere to these rules

The linting can be run by npm run lint

Author: pascalseeland

viplab-standalone-frontend-vue/.eslintrc

@@ -0,0 +1,25 @@
+{
+    "env": {
+        "browser": true,
+        "es6": true,
+        "node": true
+    },
+    "extends": [
+        "eslint:recommended",
+        "airbnb-base",
+        "plugin:vue/essential"
+    ],
+    "globals": {
+        "Atomics": "readonly",
+        "SharedArrayBuffer": "readonly"
+    },
+    "parserOptions": {
+        "ecmaVersion": 2019,
+        "sourceType": "module"
+    },
+    "plugins": [
+         "vue"
+    ],
+    "rules": {
+    }
+}

viplab-standalone-frontend-vue/babel.config.js

@@ -1,5 +1,5 @@
 module.exports = {
   presets: [
-    '@vue/app'
-  ]
-}
+    '@vue/app',
+  ],
+};