Support ZMQ socks proxy

[vitalrev]

Same as INDY-SDK Issue 2399
must be implemented/copied in INDY-VDR too

By using INDY-VDR behind a corporate proxy, a socks proxy must be configured for ZMQ socket connections.
Zero MQ Socket supports this by setting the ZMQ_SOCKS_PROXY property, for Rust Wrapper is it set_socks_proxy function.
The problem is, that the INDY-VDR doesn't support the possibility to set and pass on the property to ZMQ.

[vitalrev]

I am preparing a pull request

[vitalrev]

pull request is merged