Add support for Blindsign ui

[chcmedeiros]

🔗 zboto Link

[emmanuelm41]

@chcmedeiros I have some questions:

• Are we testing this somewhere?
• Are we adding a new setting to enable blind signing or not? Don't we usually do that with expert mode?
• Are we adding the setting on compile time, based on a flag? Is this correct?

[emmanuelm41]

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[chcmedeiros]

Hey @emmanuelm41!

• We don't have tests for the ui's because they need to be triggered by the apps. I tested it locally on the peaq app;
• Yes, we are adding this featured at least to peaq. This was a request from ledger, for us to follow the blind sign flow they have on eth app.
• Yes, we enable a flag on the makefile that will "unlock" the blind sign code