JS-SDK/Browser: Replace the LitConnectModal with a popular Ethereum wallet provider

[a1ttech]

Overview

Currently the SDK uses the LitConnectModal in the checkAndSignAuthMessage function for EVM chains. See here for where this modal is created.

Acceptance criteria

We want this modal to be replaced by a more standard modal, such as WAGMI connector. Analysis should be done to determine if WAGMI is the best option for a wallet provider.

[Ansonhkg]

Closing this as @anshss has started working on it:
#751