Export Config type from main index.ts

[JoshMcCullough]

Describe the bug
A border-line bug, but not really a feature... github-mocker.types is not exported in the main index.ts, so it has to be imported directly:

import { MockGithub } from '@kie/mock-github';
import { Config } from '@kie/mock-github/build/src/github/github-mocker.types';

To Reproduce
Try to import Config.

Expected behavior
Config should be exported in the main index.ts for easy access.

import { MockGithub, Config } from '@kie/mock-github';

Thank you!