Add support for AccountsChanged Unisat event

[gssvv]

Description

Implement logic that would allow to subscribe to accountsChanged event of Unisat extension to update account automatically when user switches between wallets.

Problem Statement/Justification

Currently, in sats-wagmi there's no way to update accounts when the user switches between wallets in the Unisat extension.

Proposed Solution or API

Unisat has documentation on how to listen for accountsChanged event — https://docs.unisat.io/dev/unisat-developer-center/unisat-wallet#accountschanged

Alternatives

No response

Additional Information

I haven't found information regarding other wallets. To my knowledge, Leather and Xverse wallets don't have such events. However, this is a subject for research.

[gregdhill]

I think this is already possible @gssvv unless I'm mistaken? Maybe this was fixed in a newer update