Support standard flat file format

[peaklabs-dev]

It would be good if importing the config worked the same way as with all the other plugins and rules. It would be much cleaner.

Standard way:

import { defineConfig } from "eslint/config";
import js from '@eslint/js';
import tseslint from 'typescript-eslint';
import svelte from 'eslint-plugin-svelte';
import prettier from 'eslint-plugin-prettier';

export default defineConfig(
  js.configs.recommended,
  ...tseslint.configs.strict,
  ...tseslint.configs.stylistic,
  ...svelte.configs.recommended,
  ...svelte.configs.prettier,
  ...prettier.configs.recommended, // This does not work at the moment.
	{
//
	},
);

Current way:

import { defineConfig } from "eslint/config";
import js from '@eslint/js';
import tseslint from 'typescript-eslint';
import svelte from 'eslint-plugin-svelte';
import eslintPluginPrettierRecommended from 'eslint-plugin-prettier/recommended';

export default defineConfig(
  js.configs.recommended,
  ...tseslint.configs.strict,
  ...tseslint.configs.stylistic,
  ...svelte.configs.recommended,
  ...svelte.configs.prettier,
  eslintPluginPrettierRecommended
	{
//
	},
);

[BPScott]

See #765 (comment)

At some point we will make a breaking change to drop support for ESLint v8, and align our flat config with conventions that have grown since our initial implementation of flat config.

I'm going to close this issue as we won't be making changes to flat config till we do that major version release, and that won't happen till we have a compelling reason to do so, as currently the project is stable and has no need for new features at this point in time.