Client - update ESLint rules

fittrackee_client/.eslintrc.cjs

@@ -34,6 +34,7 @@ module.exports = {
       }
     ],
     'import/no-unresolved': ['off', { ignore: ['^@/'] }],
-    'vue/multi-word-component-names': 'off'
+    'vue/multi-word-component-names': 'off',
+    '@typescript-eslint/no-unused-vars': 'error'
   }
 }