✨ Feature: Migration support from SA V2 to Nexus through SDK

[joepegler]

[VGabriel45]

I highly recommend this to be added, we already have 2 clients interested to migrate to Nexus.
Not sure how much this will take yet.

[livingrockrises]

please read through and verify this test case and then use it as a reference.

https://github.com/bcnmy/nexus/blob/dev/test/foundry/fork/arbitrum/ArbitrumSmartAccountUpgradeTest.t.sol