Install prettier as dev dependency

Author: pcatkins

src/ECER.Clients.RegistryPortal/ecer.clients.registryportal.client/package-lock.json

@@ -33,7 +33,7 @@
     "uuid": "^11.1.0",
     "vue": "^3.5.17",
     "vue-router": "^4.5.1",
-    "vuetify": "^3.9.0"
+    "vuetify": "^3.9.5"
   },
   "devDependencies": {
     "@chromatic-com/storybook": "^4.0.1",
@@ -63,6 +63,7 @@
     "husky": "^9.1.7",
     "openapicmd": "^2.6.1",
     "playwright": "^1.53.1",
+    "prettier": "^3.6.2",
     "sass": "^1.86.3",
     "storybook": "^9.0.17",
     "tsx": "^4.20.3",