chore: Add eslint vitest plugin (#98)

Author: gethinwebster

.eslintrc

@@ -6,13 +6,14 @@
     "plugin:react/recommended",
     "plugin:react-hooks/recommended",
     "plugin:prettier/recommended",
-    "prettier/@typescript-eslint"
+    "prettier/@typescript-eslint",
+    "plugin:@vitest/legacy-recommended"
   ],
   "parserOptions": {
     "ecmaVersion": 2018,
     "sourceType": "module"
   },
-  "plugins": ["unicorn", "header"],
+  "plugins": ["unicorn", "header", "@vitest"],
   "rules": {
     "@typescript-eslint/ban-ts-comment": ["error", { "ts-expect-error": "allow-with-description" }],
     "@typescript-eslint/interface-name-prefix": "off",
@@ -29,7 +30,8 @@
       "error",
       "line",
       [" Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.", " SPDX-License-Identifier: Apache-2.0"]
-    ]
+    ],
+    "@vitest/no-focused-tests": "error"
   },
   "settings": {
     "react": {