Consider allowing developers to set a 'default' connector when no connectors are in use

[Dhaiwat10]

[feature request]

It would be nice if the @fuels/react package allowed developers to specify a default connector (in most cases the burner wallet connector) to be used if the user hasn't connected a wallet using any of the other connectors yet.

This is so that the user doesn't have to explicitly go and select the burner wallet from the connect button, instead of that it's always there already if there are no other connectors active. This could improve the UX of dapps, especially on mobile.

Looking for a UX similar to the one seen at https://create-fuels-template.vercel.app/