Tasks remaining -> Offline mode (serverless)

[juanky201271]

We need to use this command to change to no server -> with the parameter empty, something like:

commands::do_user_command("changeserver", "", lightclient.as_ref())

We need to start zingo-cli with no server -> with this parameter empty. And we need all the commands like balance or valuetransfers working with the information stored in the file wallet.dat.

We need this: LightClient::read_wallet_from_buffer_runtime working, using an instance of config that was created with no server -> http::Uri::default().

[juanky201271]

would be nice if the user can start zingo-cli with no server. This is the Error:

[juanky201271]

Thanks @dorianvp , closing...