* Move ShippingDimensionsImage component to @woocommerce/product-editor package
* Create woocommerce/product-shipping-dimensions-fields block
* Register woocommerce/product-shipping-dimensions-fields block
* Add changelog files
* Fix php linter error
* Change unused attr name to __contentEditable to better indicate the porpose
* Remove manually set block className because is autogenerated base on the block name