Description
When creating a transaction, if the amount of signers is higher than 1, the user should be redirected to the "Proposed" tab of the Transactions page.

Here, we should show:

• A list of proposed transactions (including its details)
• An indicator showing signer decisions: approved, rejected, and missing
• When the threshold is met for a transaction, a "Execute" button should show up

UI/UX is not a priority at this stage. Take full liberty on design decisions (in moderation). Data should be mocked for now since we cannot approve a transaction at the moment.