Admin console - Nuxeo Server version information

As a system administrator, I can tell what version of Nuxeo Server is currently deployed

Context:
It is critical to know at a glance what version of my application is currently deployed to tell which fixes are supposed to apply, to debug a particular issue, to see if a deployment that I requested happened successfullly.
[SYSINFO-SUMMARY]

AC

*IN SCOPE*
When cluster is enabled, an information is shown:
The information below only relates to this specific cluster node.

Information is displayed about:
Version: [VERSION NUMBER, e.g., Nuxeo Platform 2021.45.8]
Cluster Enabled: true/false

OUT SCOPE

I can get additional details by clicking on a "Details" button (see story [SYSINFO-DETAILS])