Auto reconnect without additional logic

[mhofma]

Hi,

Currently, if a reconnection happens, all subscriptions have to be re-assigned. And as far as I know, this is not necessary with the python-bindings (or, better with the rust-implementation). Therefore, zenoh-ts breaks the known behaviour of the session class.

Coming from socketio, I'm used to not-handle reconnection-issues. This strongly reduces complexity in client-code.

[maru7777]

+1

now client can not know if the connection is still alive (no heartbeat) and can not reconnect to server (no reconnection)

it is neccseary