Add a way to navigate to the Preferences screen.

Once the user sets the preferences, there is no way to change them from the Extension. The user must open the Raycast preferences, search for the extension and then change the values.

A possible solution may be to add a new function to the API similar to popToRoot.

A simple use case would be when the user adds a token, if it is not valid they should be able to change it to continue.