Add artisan make:bag command

This release adds support for a new artisan make:bag command to make creating Bag Value objects, Collections, and especially Factories quicker.

Learn more in the documentation.

Bag 1.0

This is the initial release of Bag.

New Contributors

• @dshafik (creator)
• @elazar made their first contribution in #6
• @raphaelstolt made their first contribution in #4

Full Changelog: https://github.com/dshafik/bag/commits/1.0.0