Move the totals components to the components package

[opr]

Move the TotalsWrapper component and the totals folder and all the components inside it (TotalsFees, TotalsItem, Subtotal, TotalsTaxes) in the @woocommerce/blocks-checkout package into the @woocommerce/blocks-components package.

Note, these should still be exported from @woocommerce/blocks-checkout too but the code should live in the components package.

You should be able to get all of the existing totals components and the TotalsWrapper from window.wc.blocksCheckout and window.wc.blocksComponents