Add function to override default use-contractkit wallet config

[aslawson]

Add function that dapps can use to override the default centralized wallet configurations.

This should enable wallets to specify which wallets to omit and what order to present wallet to their users.

[Deepcryptodive]

Yes please! This is a must-have if we're really trying to build an open and inclusive ecosystem.

[dckesler]

Duplicate