Restore missing content in Billing, Payment and Accounts section

[heunland]

The section titled Billing, Payment and Accounts https://docs.storj.io/dcs/billing-payment-and-accounts has no content besides the heading. The last change to this page was on March 3, 2023.

There is a link to this section from https://docs.storj.io/dcs/getting-started/satellite-developer-account/billing#-oEMj :

Please read the Billing, Payment & Accounts section for details.

Please restore the content that was in this section before or link to whatever is the new page where this content went.