feat: Implement initial Go backend and React frontend project structure for the gotail application.

frontend/vitest.config.ts

@@ -0,0 +1,24 @@
+import { defineConfig } from 'vitest/config';
+import react from '@vitejs/plugin-react';
+
+export default defineConfig({
+  plugins: [react()],
+  test: {
+    globals: true,
+    environment: 'jsdom',
+    setupFiles: './src/test/setup.ts',
+    css: true,
+    coverage: {
+      provider: 'v8',
+      reporter: ['text', 'json', 'html'],
+      exclude: [
+        'node_modules/',
+        'src/test/',
+        '**/*.d.ts',
+        '**/*.config.*',
+        '**/mockData',
+        'dist/',
+      ],
+    },
+  },
+});