2020-11-27-create-cross-selling-block.md

title	issue
Create "Cross Selling" block	NEXT-12060

Administration

• Added sw-cms-block-cross-selling component
• Added sw-cms-preview-cross-selling component
• Changed productDetailBlocks in module/sw-cms/page/sw-cms-detail/index.js to initialize "cross selling" block in product detail page layout