Add Gnosis Safe authentication support

[denviljclarke]

Description

We need to enable gnosis-safe wallets, which have an allocation to connect and authenticate. Currently, connecting with Gnosis Safes using RainbowKits authentication flow is not supported. Below is some more information on the issue and potential solutions.

The leading cause of the issue is the difference between Safe signatures & regular wallet signatures and that RainbowKit doesn't handle it in their auth flow (The issue in the RainbowKit repo). However, it seems other teams have run into this and have documented solutions.

Gallery
MightBear Games

To add Gnosis Safe support, we'll have to implement a solution that allows them to authenticate. Maybe there's another way to handle this. Feel free to update this or add any comments.

Acceptance criteria

• Gnosis Safes can connect and authenticate
• Gnosis Safes can claim ( this will be harder to test unless we have a test deployment of governance on main net as app.safe.global doesn't support any testnets)

[denviljclarke]

Story Points: 5
See the discussion in Grooming - Mar 28

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[chapati23]

We decided we won't support claiming via Safes. Instead, we've split up the Safe allocations amongst the Safe owners so they can claim individually