Add prmon version to the JSON output

[amete]

Hi @graeme-a-stewart,

This is one way to proceed w/ adding the version number to the JSON. Actually, maybe we can tweak the CMakeLists.txt a bit to put the correct version of prmonVersion.h in a dedicated folder and add that to the include directories to make things a bit tidier but this should functionally work:

{
  "Avg": {
    "nprocs": 1.0,
    "nthreads": 1.0,
    "pss": 586.333,
    "rchar": 851.533,
    "read_bytes": 8376.0,
    "rss": 1376.0,
    "rx_bytes": 0.0,
    "rx_packets": 0.0,
    "swap": 0.0,
    "tx_bytes": 0.0,
    "tx_packets": 0.0,
    "vmem": 2516.0,
    "wchar": 0.0,
    "write_bytes": 0.0 
  },  
  "HW": {
    "cpu": {
      "CPUs": 4,
      "CoresPerSocket": 1,
      "ModelName": "Intel(R) Core(TM) i5-8257U CPU @ 1.40GHz",
      "Sockets": 4,
      "ThreadsPerCore": 1
    },  
    "mem": {
      "MemTotal": 2038904
    }   
  },  
  "Max": {
    "nprocs": 1,
    "nthreads": 1,
    "pss": 589,
    "rchar": 4164,
    "read_bytes": 40960,
    "rss": 1376,
    "rx_bytes": 0,
    "rx_packets": 0,
    "stime": 0,
    "swap": 0,
    "tx_bytes": 0,
    "tx_packets": 0,
    "utime": 0,
    "vmem": 2516,
    "wchar": 0,
    "write_bytes": 0,
    "wtime": 4
  },  
  "Version": "2.1.1"
}

Please let me know what you think.

Best,
Serhan

Closes #175

[graeme-a-stewart]

Thanks @amete !

So would it be worth adding a new section for this data, i.e.,

metadata["prmon"]["version"] = @VERSION@

This would mean if we felt we needed to add anythign else from prmon itself in the future it would have a clear place to go.

[amete]

Thanks a lot @graeme-a-stewart. Now we have a separate block for the metadata:

{
  ...
  "prmon": {
    "Version": "2.1.1"
  }
}

Indeed if we wish to add more meta data down the line, it would be cleaner to populate this dedicated section.

[graeme-a-stewart]

Looks great - thanks @amete !