@fuels/react - create connectAsync method on usConnectUI

[luizstacio]

With usConnect users are able to chose between a connectAsync or connect this is useful when applications want to integrate the connection of a wallet in the middle of a specific flow. One example is the sway-playground where the connection is integrated on the flow of the deploy.

But currently usConnectUI does not support a async connect method. We should create a new method and all the logic to support connectAsync also on the connect ui.

On this Task;

• Implement connectAsync for usConnectUI
• Once users trigger connectAsync it should resolve;
• If user selects a wallet and connects return true;
• If user selects a wallet but a error happens reject with error;
• If user closes the Connector Selection UI resolves to false;