DOCSP-4597: Add charts geoglobe icon

Author: i80and

source/reference/icon.txt

@@ -33,6 +33,12 @@ list.
    Press the :icon-fa5-brands:`Windows logo <windows>` key. This has the
    caption ``Windows logo``.
 
+
+.. note::
+
+   Icons associated with a specific docs project should only be used
+   by that project.
+
 Regular Icons (``icon-fa5``)
 ----------------------------
 
@@ -72,3 +78,8 @@ MMS Org (``icon-mms-org``)
 This role uses the MMS Org icon font.
 
 .. icon-mms-org-help::
+
+Charts (``icon-charts``)
+--------------------------
+
+.. icon-charts-help::