Refactor playground to use Vue (#18463)

Co-authored-by: fisker <172584+fisker@users.noreply.github.com>
Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>

eslint.config.js

@@ -1,6 +1,5 @@
 import url from "node:url";
 import eslintPluginJs from "@eslint/js";
-import eslintPluginEslintReact from "@eslint-react/eslint-plugin";
 import eslintPluginStylistic from "@stylistic/eslint-plugin";
 import eslintPluginTypescriptEslint from "@typescript-eslint/eslint-plugin";
 import { isCI } from "ci-info";
@@ -457,8 +456,11 @@ const configs = [
     },
   },
   {
-    files: ["website/**/*"],
-    ...eslintPluginEslintReact.configs.recommended,
+    files: ["website/src/pages/**/*.jsx", "website/playground/**/*.jsx"],
+    rules: {
+      // Doesn't know JSX
+      "no-unused-vars": "off",
+    },
   },
   {
     files: ["website/**/*"],
@@ -470,11 +472,6 @@ const configs = [
         },
       },
     },
-    settings: {
-      "react-x": {
-        version: "18",
-      },
-    },
     rules: {
       "unicorn/filename-case": "off",
     },