* Misc - Add support for the WooCommerce Checkout block
* Dev - Checkout block draft orders are considered auto-drafts for the purposes of sequential order numbers
* Tweak - Also set sequential order numbers for orders sent via the WooCommerce Checkout Block
* Fix - Ensure that searching orders in the admin screen by order number can return consistent results when using HPOS
* Fix - Ensure that sequential order numbers can be persisted on sites with HPOS enabled
* FIx - Ensure that admin orders in sites using HPOS can set a sequential order number
