docs-util: fixes to base OAS + circular-patch redocly plugin (#7382)

* docs-util: remove MultipleErrors schema from base OAS

* fixes to circular patch plugin

* general fixes

* change nested schemas to references

www/apps/api-reference/package.json

@@ -36,6 +36,7 @@
     "next-mdx-remote": "^4.4.1",
     "openapi-sampler": "^1.3.1",
     "openapi-types": "^12.1.3",
+    "pluralize": "^8.0.0",
     "postcss": "8.4.27",
     "prism-react-renderer": "2.3.1",
     "react": "^18.2.0",
@@ -54,6 +55,7 @@
   "devDependencies": {
     "@next/bundle-analyzer": "^14.2.3",
     "@types/jsdom": "^21.1.1",
+    "@types/pluralize": "^0.0.33",
     "types": "*"
   },
   "engines": {