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/remark-rehype-plugins/.eslintrc.cjs

@@ -1,9 +0,0 @@
-const path = require("path")
-
-module.exports = {
-  extends: ["docs"],
-  parserOptions: {
-    project: true,
-    tsconfigRootDir: path.join(__dirname, "..", ".."),
-  },
-}

www/packages/remark-rehype-plugins/package.json

@@ -40,7 +40,6 @@
   "devDependencies": {
     "@types/node": "^20.11.20",
     "docs-ui": "*",
-    "eslint-config-docs": "*",
     "rimraf": "^5.0.5",
     "tsconfig": "*",
     "types": "*",