Bootstrap monorepo: Hono API, React PWA, Drizzle DB, CI/CD

Sets up the initial project structure for groombook/groombook:

- pnpm monorepo with apps/api (Hono + TypeScript), apps/web (React + Vite + PWA), packages/db (Drizzle ORM), packages/types (shared types)
- Core DB schema: clients, pets, services, appointments, staff with CNPG-compatible Postgres
- REST API routes for clients, pets, services, appointments with Zod validation
- OIDC auth middleware for Authentik integration
- React PWA with vite-plugin-pwa, service worker, offline caching, installable manifest
- GitHub Actions CI: lint, typecheck, test, build, Docker image build (groombook-runners)
- Dockerfiles for API (Node.js) and Web (nginx)
- docker-compose.yml for local development

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

apps/web/src/App.tsx

@@ -0,0 +1,28 @@
+import { Routes, Route, Link } from "react-router-dom";
+import { AppointmentsPage } from "./pages/Appointments.js";
+import { ClientsPage } from "./pages/Clients.js";
+import { ServicesPage } from "./pages/Services.js";
+
+export function App() {
+  return (
+    <div>
+      <nav style={{ padding: "1rem", borderBottom: "1px solid #e2e8f0" }}>
+        <strong style={{ marginRight: "1.5rem" }}>Groom Book</strong>
+        <Link to="/" style={{ marginRight: "1rem" }}>
+          Appointments
+        </Link>
+        <Link to="/clients" style={{ marginRight: "1rem" }}>
+          Clients
+        </Link>
+        <Link to="/services">Services</Link>
+      </nav>
+      <main style={{ padding: "1rem" }}>
+        <Routes>
+          <Route path="/" element={<AppointmentsPage />} />
+          <Route path="/clients" element={<ClientsPage />} />
+          <Route path="/services" element={<ServicesPage />} />
+        </Routes>
+      </main>
+    </div>
+  );
+}