Guided Interface for Writing SSKR shares to NFC tags

Seed Tool allows you to export individual shares of an SSKR split one by one. This process currently requires users to manually keep track of which tags they have written in what order, and gives no guidance as to best practices for doing this.

This enhancement would provide a guided interface for writing a set of NFC tags, where the user would be told how many tags they need and how to label them (including a date by which the integrity of the card should be checked), then would be told to write each tag in turn. Before writing a tag, the interface would read it to ensure that the user is not accidentally overwriting a tag already written that session. Before completion, the user would be given a way to verify that the tags have been correctly written.