test: add linter

.eslintrc.js

+module.exports = {
+    "env": {
+        "browser": true,
+        "es2021": true
+    },
+    "extends": "plugin:vue/essential",
+    "parserOptions": {
+        "ecmaVersion": 12,
+        "sourceType": "module"
+    },
+    "plugins": [
+        "vue"
+    ],
+    "rules": {
+    }
+};

package.json

@@ -6,11 +6,16 @@
     "dev": "nuxt",
     "build": "nuxt build",
     "start": "nuxt start",
-    "generate": "nuxt generate"
+    "generate": "nuxt generate",
+    "lint": "eslint --ext .ts,.js,.vue ."
   },
   "dependencies": {
     "core-js": "^3.8.3",
     "nuxt": "^2.14.12"
   },
-  "devDependencies": {}
-}
+  "devDependencies": {
+    "@nuxtjs/eslint-config-typescript": "^5.0.0",
\ No newline at end of file
+    "eslint": "^7.20.0",
+    "eslint-plugin-vue": "^7.6.0"
+  }
+}