Fixes #591.
Fixes #592.
Original ideas extracted from #592.

Add flat recommended config file. Unlike the legacy recommended file this only enables the prettier rule and disables arrow-body-style and arrow-body-style. It does not enable anything from eslint-config-prettier.

It is now the responsibility of the consumer to enable both eslint-plugin-prettier and eslint-config-prettier. Configs extending other configs is complicated and not transparent. We should trust the user to configure their configs directly. In a future major change we should remove eslint-config-prettier from the legacy config too, as over lap between the responsibilities of eslint-plugin-prettier and eslint-config-prettier have always been a bit confusing and "a plugin goes and enables configs from other plugins" feels a bit odd. I think it is simpler if we push consumers towards "you configure both eslint-plugin-prettier and eslint-config-prettier in your repo's linting config.

Use it like this:

// eslint.config.js
const eslintPluginPrettierRecommended = require('eslint-plugin-prettier/recommended');
const eslintConfigPrettier = require('eslint-config-prettier');

return [
  eslintPluginPrettierRecommended,
  eslintConfigPrettier,
]