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Issue Description

I expect the following config to work for linting TS files, but, instead, eslint issues an error ("File ignored because no matching configuration was supplied") when linting a TS file. This is due to the fact that eslint requires a file to be included in at least one config object's files field in order to be linted.

import tseslint from 'typescript-eslint';

export default tseslint.config(
    tseslint.configs.base,
    {
        rules: {
            '@typescript-eslint/no-unused-vars': 'error',
        }
    }
);

Right now, the description for the base config (link) says

A minimal ruleset that sets only the required parser and plugin options needed to run typescript-eslint.

Technically, that's true, but it doesn't set all the options required to run typescript-eslint on TS files. Surprisingly, this is only done in the rest of our configs by virtue of the fact that they include the eslint-recommended config, which has files set primarily in order to disable eslint core rules.

To see this, note that the following errors on TS files:

export default tseslint.config(
    (() => {
        const recommendedCopy = [...tseslint.configs.recommended];
        recommendedCopy.splice(1, 1); // remove the eslint-recommended config
        return recommendedCopy;
    })(),
);

I propose - let's add files: ['**/*.ts', '**/*.tsx', '**/*.mts', '**/*.cts'] to the base config so that it enables linting on TS files.

Reproduction Repository Link

https://github.com/kirkwaiblinger/tseslint-base-files-repro/

Repro Steps

1. clone the repo
2. npm i
3. npm test

Versions

all version of eslint 9 and typescript-eslint 8 that I tried

Specifically, repros on latest:

    "eslint": "9.28.0",
    "typescript-eslint": "8.34.0"