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/tailwind/package.json

@@ -4,9 +4,6 @@
   "private": true,
   "license": "MIT",
   "main": "tailwind.config.js",
-  "devDependencies": {
-    "eslint-config-docs": "*"
-  },
   "publishConfig": {
     "access": "public"
   },