feat: implement auth system, passkeys, and user management

Add PostgreSQL and Redis integration for users and sessions
Implement password and WebAuthn passkey login flows
Add Docker stack, super-admin seeding, and protected routes

server/api/auth/me.get.ts

@@ -0,0 +1,9 @@
+import { getAuthContext } from '../../utils/auth'
+
+export default defineEventHandler(async (event) => {
+  const auth = await getAuthContext(event)
+
+  return {
+    user: auth?.user ?? null
+  }
+})