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

package.json

@@ -7,11 +7,16 @@
     "dev": "nuxt dev",
     "generate": "nuxt generate",
     "preview": "nuxt preview",
+    "start": "node .output/server/index.mjs",
     "postinstall": "nuxt prepare"
   },
   "dependencies": {
     "@nuxt/ui": "4.6.1",
+    "@simplewebauthn/browser": "^13.3.0",
+    "@simplewebauthn/server": "^13.3.0",
     "nuxt": "^4.4.2",
+    "postgres": "^3.4.9",
+    "redis": "^5.11.0",
     "vue": "^3.5.32",
     "vue-router": "^5.0.4"
   },