Added vitest (#5)

* Moved eslint and @nuxt/eslint to devDependencies

* Added vitest to project and 1 test

* Tweaked Sonar workflow in order to run tests and coverage

* Removed offending config line

tests/app.test.ts

@@ -0,0 +1,18 @@
+import { describe, expect, it } from "vitest";
+import type { VueWrapper } from "@vue/test-utils";
+import { mount } from "@vue/test-utils";
+import App from "../app/app.vue";
+
+describe("app.vue", () => {
+  const wrapper: VueWrapper = mount(App, {
+    global: {
+      stubs: {
+        NuxtRouteAnnouncer: true,
+        NuxtWelcome: true,
+      },
+    },
+  });
+  it("renders without crashing", () => {
+    expect(wrapper.exists()).toBe(true);
+  });
+});