fix(typescript-eslint): export types so that declarations can be named for dts files (#10513)

* fix(typesript-eslint): export types so that declarations can be named for dts files

* Update index.ts

Author: bradzacher

packages/typescript-eslint/src/config-helper.ts

@@ -66,6 +66,9 @@ export interface ConfigWithExtends extends TSESLint.FlatConfig.Config {
   extends?: InfiniteDepthConfigWithExtends[];
 }
 
+// exported so that users that make configs with tsconfig `declaration: true` can name the type
+export type ConfigArray = TSESLint.FlatConfig.ConfigArray;
+
 /**
  * Utility function to make it easy to strictly type your "Flat" config file
  * @example
@@ -88,7 +91,7 @@ export interface ConfigWithExtends extends TSESLint.FlatConfig.Config {
  */
 export function config(
   ...configs: InfiniteDepthConfigWithExtends[]
-): TSESLint.FlatConfig.ConfigArray {
+): ConfigArray {
   const flattened =
     // @ts-expect-error -- intentionally an infinite type
     configs.flat(Infinity) as ConfigWithExtends[];

packages/typescript-eslint/src/index.ts

@@ -186,4 +186,9 @@ export default {
 };
 export { configs, parser, plugin };
 
-export { config, type ConfigWithExtends } from './config-helper';
+export {
+  config,
+  type ConfigWithExtends,
+  type InfiniteDepthConfigWithExtends,
+  type ConfigArray,
+} from './config-helper';