Add OpenAPI specification generation for OpenWebUI integration (#295)

Co-authored-by: samanhappy <samanhappy@gmail.com>

package.json

@@ -53,6 +53,7 @@
     "adm-zip": "^0.5.16",
     "axios": "^1.11.0",
     "bcryptjs": "^3.0.2",
+    "cors": "^2.8.5",
     "dotenv": "^16.6.1",
     "dotenv-expand": "^12.0.2",
     "express": "^4.21.2",
@@ -79,6 +80,7 @@
     "@tailwindcss/postcss": "^4.1.12",
     "@tailwindcss/vite": "^4.1.12",
     "@types/bcryptjs": "^3.0.0",
+    "@types/cors": "^2.8.19",
     "@types/express": "^4.17.23",
     "@types/jest": "^29.5.14",
     "@types/jsonwebtoken": "^9.0.10",