New command `stellar network version-info`

[ifropc]

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Command name is TBD, open to alternative names

Command description

Command that uses RPC getVersionInfo endpoint

Command flags

Optional --output json flag that changes output format to JSON (printing result object)

Command return value

Print version info in human readable format, for example:

RPC server version: 21.1.0,
RPC server commit hash: fcd2f0523f04279bae4502f3e3fa00ca627e6f6a,
...