Add eslint

Add eslint and the configuration needed to lint javascript and vue files.

.eslintrc.js

@@ -0,0 +1,17 @@
+module.exports = {  
+  extends: [
+    'eslint-config-airbnb-base',
+    'plugin:vue/vue3-strongly-recommended'
+  ],
+  rules: {
+    'linebreak-style': 'off'
+  },
+  settings: {
+    'import/resolver': {
+      alias: {
+        map: [['@', './src/']],
+        extensions: ['.js', '.vue']
+      }
+    }
+  }
+};

package.json

@@ -29,6 +29,11 @@
     "@vue/test-utils": "^2.0.0-0",
     "@vue/vue3-jest": "^27.0.0-alpha.1",
     "babel-jest": "^27.0.6",
+    "eslint": "8.29.0",
+    "eslint-config-airbnb-base": "15.0.0",
+    "eslint-import-resolver-alias": "1.1.2",
+    "eslint-plugin-import": "2.26.0",
+    "eslint-plugin-vue": "9.8.0",
     "jest": "^27.0.5",
     "sass": "^1.32.7",
     "sass-loader": "^12.0.0"