improvement: fixed some package.json issues. readme files updated.

backend/package.json

@@ -41,6 +41,7 @@
     "@nestjs/swagger": "^11.2.6",
     "@nestjs/throttler": "^6.5.0",
     "@prisma/client": "^6.19.2",
+    "prisma": "^6.19.2",
     "adminjs": "^7.8.17",
     "axios": "^1.13.5",
     "bcrypt": "^6.0.0",
@@ -84,7 +85,6 @@
     "globals": "^16.0.0",
     "jest": "^30.0.0",
     "prettier": "^3.4.2",
-    "prisma": "^6.19.2",
     "source-map-support": "^0.5.21",
     "supertest": "^7.0.0",
     "ts-jest": "^29.2.5",
@@ -94,6 +94,10 @@
     "typescript": "^5.7.3",
     "typescript-eslint": "^8.20.0"
   },
+  "overrides": {
+    "@tiptap/core": "2.27.2",
+    "@tiptap/pm": "2.27.2"
+  },
   "jest": {
     "moduleFileExtensions": [
       "js",