[feature-request] orthanc statistics

[Pandemonium1986]

Purpose

In the same way of orthanc system wich lead to http(s)://my_orthanc/system.
It will be interessting to have orthanc statistics which lead to to http(s)://my_orthanc/statistics

With the same "pretty print" than orthanc system

Example

orthanc statistics

Orthanc Statistics Information
==========================
Count:
  Instances   : 86197
  Patients    : 168
  Series      : 923
  Studies     : 168

Size:
 Total Disk              : 63534758198
 Total Disk (MB)         : 60591
 Total Uncompressed      : 63534758198
 Total Uncompressed (MB) : 60591