User onboarding: extend the wBTC transfer with social logins and initial user funding

[nud3l]

Is your feature request related to a problem? Please describe.
The wBTC transfer demo https://demo-account-abstraction.gobob.xyz/ showcases the power of using AA to allow users to pay transaction fees in ERC20s. However:

1. Users still need to bridge ETH to BOB making the process to onboard quite lengthy.
2. Users need to create a new wallet if they come from Bitcoin.

Describe the solution you'd like

1. Create smart contract accounts on behalf of users (they should not need ETH) to get started
2. Users then fund the accounts using the faucet (this will need to be added as a way to do this in prod)
3. Allow users to use social logins to transfer wBTC