feat: add testing library dependencies and implement component tests

vite.config.ts

@@ -1,7 +1,13 @@
+/// <reference types="vitest" />
 import { defineConfig } from "vite";
 import react from "@vitejs/plugin-react";
 
 // https://vite.dev/config/
 export default defineConfig({
   plugins: [react()],
+  test: {
+    globals: true,
+    environment: "jsdom",
+    setupFiles: "./src/setupTests.ts",
+  },
 });