Merge pull request 'feat: adds PDF import with conversion to JSON 1.0' (#1) from pdf2json-feat into main

Reviewed-on: #1

backend/package.json

@@ -16,6 +16,9 @@
     "cors": "^2.8.6",
     "dotenv": "^17.3.1",
     "express": "^5.2.1",
+    "multer": "^2.1.1",
+    "openai": "^6.27.0",
+    "pdf-parse": "^2.4.5",
     "pg": "^8.19.0",
     "uuid": "^13.0.0"
   },
@@ -23,6 +26,7 @@
     "@types/cookie-parser": "^1.4.10",
     "@types/cors": "^2.8.19",
     "@types/express": "^5.0.6",
+    "@types/multer": "^2.1.0",
     "@types/node": "^25.3.3",
     "@types/pg": "^8.18.0",
     "@types/uuid": "^10.0.0",