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/tsconfig.json

@@ -2,5 +2,7 @@
   "extends": ["tsconfig/base.json"],
   "compilerOptions": {
     "rootDir": "."
-  }
+  },
+  "include": ["**/*.ts", "**/*.js", "**/*.tsx", "**/*.jsx", "**/*.mjs"],
+  "exclude": ["**/node_modules/**", "**/dist/**", "**/build/**"]
 }