* Update item count badge styles
* Make sure item count badge doesn't break in multiple lines
* Make item count badge have white background
* Add docs
* Move order summary CSS properties outside of the sidebar class to reduce specificity
* Move Order summary to its own component
* Checkout class tidyup
* CheckoutProcessor placeholder
* ShippingMethodDataX to ShippingDataX
* Remove billing from checkout provider
* Remove billing data hook
* Remove billing from payment methods state
* Update typedefs
* Billing context
* Fix billing and shipping context persistence bugs
* Remove address form change
* Move phone back; another PR can deal with this
* Remove unused state