`vue/block-lang` do not support enforcement of lang attritbutes for default langauges

Checklist

[x] I have tried restarting my IDE and the issue persists.
[x] I have read the FAQ and my problem is not listed.

Tell us about your environment

ESLint version: 9.11.1
eslint-plugin-vue version: 9.28.0
Vue version: 3.5.10
Node version: v20.14.0
Operating System: Ubuntu
vscode: 1.95.2

Please show your full configuration:

import { includeIgnoreFile } from "@eslint/compat";
import js from "@eslint/js";
import eslintConfigPrettier from "eslint-config-prettier";
import tailwind from "eslint-plugin-tailwindcss";
import pluginVue from "eslint-plugin-vue";
import globals from "globals";
import path from "node:path";
import { fileURLToPath } from "node:url";

const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);
const gitignorePath = path.resolve(__dirname, ".gitignore");

export default [
  {
    files: ["src/**/*.js", "src/**/*.vue"],
  },
  includeIgnoreFile(gitignorePath),
  js.configs.recommended,
  ...pluginVue.configs["flat/recommended"],
  ...tailwind.configs["flat/recommended"],
  eslintConfigPrettier,
  {
    languageOptions: {
      globals: {
        ...globals.node,
      },
    },
    rules: {
      "no-unused-vars": "warn",
      "tailwindcss/no-custom-classname": "off",
      "vue/no-v-html": "off",
      "vue/multi-word-component-names": "off",
      "vue/block-lang": [
        "error",
        {
          script: {
            lang: "js",
          },
        },
      ],
    },
  },
];

What did you do?
When using vscode with the "Vue - official" (vue.volar) extension in a Vite setup the Intellisense does not assume that the default language is JavaScript. In order to work around this limitation I was thinking of using the 'vue/block-lang` to enforce that a language is specified for every script block.

Formatting files like:

<script setup lang="js">
</script>

What did you expect to happen? I expected rule to honor my settings to require script blocks to specify lang="js".

What actually happened?

The rule outputs errors regarding the default language is specified:

  11:15  error  Do not explicitly specify the default language for the 'lang' attribute of '<script>'  vue/block-lang

Based on my understanding of the rule's code, if an default language is specified, then omitting the language is preferred: https://github.com/vuejs/eslint-plugin-vue/blob/16c877892ba58b2cd1e68612553c1e8c2715d8ea/lib/rules/block-lang.js#L60-L89 It seems that this assumption was valid when Vetur was used for the official vscode extension: https://github.com/vuejs/eslint-plugin-vue/blob/16c877892ba58b2cd1e68612553c1e8c2715d8ea/docs/rules/block-lang.md?plain=1#L57-L62 It would be nice if the Vue vscode extension were better at handling the lang attribtue but I also feel that this rule shouldn't be as opinionated as it is now.

Repository to reproduce this issue

vuejs / eslint-plugin-vue

`vue/block-lang` do not support enforcement of lang attritbutes for default langauges #2606