* Add Empty Cart View with inner blocks
* Add logic so empty cart is always saved and only displayed when cart is empty
* Make cart hidden until the correct display is loaded
* Add missing propTypes
* Remove is-loading class
* Import InnerBlocks from @wordpress/block-editor
* Add explanation for always rendering EmptyCart in the editor
* basic empty cart block
* use a real placeholder for placeholder editor content
* remove unnecessary Fragment
* updates to config and frontend script
* enqueue frontend script
* add example config to block registration
* change name typo