Changes to List all billing plans

the response property data/items/fee became nullable for the status 200

the data/items/fee response's property type changed from object to no type for status 200

removed the required property data/items/fee/amount from the response with the 200 status

removed the required property data/items/fee/amount_formatted from the response with the 200 status

removed the required property data/items/fee/currency from the response with the 200 status

removed the required property data/items/fee/currency_symbol from the response with the 200 status

added CommerceMoneyResponse to the data/items/fee response property allOf list for the response status 200

added the optional property data/items/unit_prices to the response with the 200 status

the response property data/items/features/items/avatar_url became nullable for the status 200

the response property data/items/features/items/description became nullable for the status 200

endpoint added