[Content]: Improve explanation surrounding order addresses and users' address book

[nfourtythree]

Product

Commerce

Description

Along with a fix in craftcms/commerce#3182 we could do with improving the documentation surrounding addresses and how they work with orders and users' address books.

Giving technical information on how addressing and orders works is vital, we could also look to give a more example based set of documentation. "Adding a guest address", "Adding an address from the address book", "Updating an address for a guest/logged in user"

[lukeholder]

https://craftcms.com/docs/commerce/5.x/reference/controller-actions.html#post-cart-update-cart

the above page is missing documentation on these params:

clearShippingAddress
clearBillingAddress
clearAddresses