feat: scaffold monorepo with Turborepo + NestJS + Next.js

- Turborepo monorepo with pnpm workspaces
- apps/api: NestJS 11.x with CQRS module
- apps/web: Next.js 14 App Router + TailwindCSS
- src/modules/shared: base entities, Result pattern, value objects
- TypeScript 5.7+ strict mode, shared tsconfig base
- Build pipeline: dev, build, lint, test, typecheck

Co-Authored-By: Paperclip <noreply@paperclip.ing>

apps/web/tailwind.config.ts

@@ -0,0 +1,14 @@
+import type { Config } from 'tailwindcss';
+
+const config: Config = {
+  content: [
+    './app/**/*.{ts,tsx}',
+    './components/**/*.{ts,tsx}',
+  ],
+  theme: {
+    extend: {},
+  },
+  plugins: [],
+};
+
+export default config;