New command: snapshot

[hubcio]

Aim of this task is to create new command for IggyClient which would be passed to iggy-server (and handled there). As a result, server should return zip file with file containing:

• filesystem dump (/tmp, local_data, /proc) - tree-like with file sizes - txt
• ps aux + top -H -b -n 1 - txt
• iptables/nftables
• lsof with all sockets
• journal of system (docker that we're running in)
• procdump

Above list can grow over time.