FR: Command Line Option to show versions

[Steve-Mcl]

TLDR;

• Add support for node-red --version that returns the version number e.g. v3.1.5
• Add support for node-red --info that returns version numbers of node, node-red, npm and OS info

A reasonable request to show node-red version via command line was requested here: https://discourse.nodered.org/t/command-line-to-show-all-versions-running/85637

To add to that, the request also asks that additional (relevant) info be returned too e.g.

uname -r
node -v
npm -v
node-red --version

As it is quite specific / different from a normal CLI where --version would be the norm, perhaps we could support this via something like --info?

NOTE: windows batch file should use ver instead of uname -r (it returns, for example "Microsoft Windows [Version 10.0.nnnnn.nnnn]")

NOTE: Trying to keep this simple as possible but useful for support folk who need to know specific info when triaging issues.