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Description
Is your feature request related to a problem? Please describe.
Similar to the dialog for adding a customer attribute I think it's equally useful to have the possibility to add properly address attributes to help with customizing the checkout process.
Describe the solution you'd like (*)
I'd like to see another item in this dialog
That allows me to add an Address Attribute easily
Describe alternatives you've considered
Currently we manually generate code for adding address attributes
Additional context
A common scenario is adding a few extra fields in the address like for accounting purposes additionally to vat id and company name required in some countries.