feat: bunch of work done here, got comments and edit and delete

package.json

@@ -29,8 +29,11 @@
     "@fastify/sensible": "6.0.4",
     "@fastify/static": "^9.0.0",
     "@prisma/client": "6.19.2",
+    "dompurify": "^3.3.1",
     "fastify": "5.2.2",
     "fastify-plugin": "5.0.1",
+    "jsdom": "^28.0.0",
+    "marked": "^17.0.1",
     "rxjs": "7.8.2"
   },
   "devDependencies": {
@@ -56,7 +59,9 @@
     "@swc-node/register": "1.9.2",
     "@swc/core": "1.5.29",
     "@swc/helpers": "0.5.18",
+    "@types/dompurify": "^3.2.0",
     "@types/jest": "30.0.0",
+    "@types/jsdom": "^27.0.0",
     "@types/jsonwebtoken": "^9.0.10",
     "@types/node": "20.19.9",
     "@typescript-eslint/utils": "8.54.0",