docs: update to next 15 + eslint 9 (#9839)

* update next

* updated react

* update eslint

* finish updating eslint

* fix content lint errors

* fix docs test

* fix vale action

* fix installation errors

www/packages/build-scripts/package.json

@@ -31,7 +31,6 @@
   },
   "devDependencies": {
     "@types/node": "^20.11.20",
-    "eslint-config-docs": "*",
     "rimraf": "^5.0.5",
     "tsconfig": "*",
     "types": "*",