docs: update typescript-eslint suggestion?

[braden-w]

According to the typescript-eslint v7 release notes, it seems that @typescript-eslint/parser is no longer recommended in flat configs, but rather just typescript-eslint.

Because this new package includes dependencies on our plugin and parser, you can replace those dependencies entirely:

pnpm remove @typescript-eslint/parser @typescript-eslint/eslint-plugin
pnpm add typescript-eslint

The simplest of this new tooling would be the following which will enable the ESLint recommended config and our recommended config (including turning on our plugin and parser):

// @ts-check

import eslint from '@eslint/js';
import tseslint from 'typescript-eslint';

export default tseslint.config(
  eslint.configs.recommended,
  ...tseslint.configs.recommended,
);

Just wanted to double check if the installation instructions in the readme should be updated accordingly or not.

[Xifong]

Does that mean our config should look like the following?

import eslintPluginAstro from 'eslint-plugin-astro';
import tseslint from 'typescript-eslint';

export default [
  // add more generic rule sets here, such as:
  // js.configs.recommended,
  ...eslintPluginAstro.configs.recommended,
  ...tseslint.configs.recommended,
  {
    rules: {
      // override/add rules settings here, such as:
      // "astro/no-set-html-directive": "error"
    },
  },
];

That leads to a Class extends value undefined is not a constructor or null and I'm not sure what the config should actually look like to get a flat config for parsing typescript astro components working.