Custom and style checkout root MGT

\app\design\frontend\bluesky\bluesky_default\Magento_Checkout\layout\checkout_index_index.xml \app\design\frontend\bluesky\bluesky_minimog_default\web\css\source_custom_bluesky_extend.less \app\design\frontend\bluesky\bluesky_minimog_default\web\images\checkout_edit.svg