Add WC transaction request flow

[clauxx]

Feature Issue

User Story

As a user, I want to know if a Wallet Connect signing request is a transaction, so that I have better control over my funds.

Description

We should have a separate screen for the transaction request, which would specify in the header that it's indeed a transaction.

Acceptance Criteria

• The user should see a transaction screen if the signing request is a transaction
• The screen should tell the user that it's a transaction request
• The user should see the name and icon of the requesting dApp
• The user should clearly see the transaction amount in the raw data (if it's only visible after scrolling, should discuss with the designer about showing the amount on the screen)