Add `ItemCompareService` to compare Magento items with CBS
This PR introduces an ItemCompareService
to compare items in Magento with the values currently in CBS. The response from the CBS API is a string formatted as <Attribute>~<Magento Value>~<CBS Value>~
. For example:
COST~0~29~MINMAX_LEVEL_MIN~51~71~MINMAX_LEVEL_MAX~70~120~VENDOR~~Apple, Inc.~SUPPLIER_PART_NUMBER~~MNHF2AM/A~MINMAX_ACTIVE~1~0~FIXED_LOT_MULTIPLIER~10~~
Please review: @ahoffmann @weizhong-wang @lloyd-carter @KJOYNER