Setup shareable dotfiles package

[nikzaugg]

Description

This Pull Requests adds the following

• one repository to hold eslint and prettier configuration files
• for eslint, there is a default configuration and one for react projects (like ionic-app)
• the worflow automatically deploys this package to the Github Package Registry

Note: because of eslint, the project needed to be named eslint-config-*, otherwise it would not detect it once you extend it. See here for more details.

The setup is inspired by this article.

Related Issues

Issue: #1

Working example: https://github.com/kwizapp/ionic-app/issues/20, where I also created a Pull Request that shows how to include this package.

Checklist

• [x] Have you added tests where necessary? Do all the test pass?
• [x] Have you added descriptive comments to your code?
• [x] Have you updated the documentation related to this propo