feat: bring in ICSExtearch to search for common file extensions

Author: timyardley

configurations/README.md

@@ -10,6 +10,7 @@ Note, if you find ICS-relevant file extensions that are not listed in the above
 - [Other Files of Interest](SCADA-Other-Files-of-Interest.tsv)
 - [File-extension seeker](https://file-extension.net/seeker/) - aggregate search engine to find info about file extensions.
 - [Data Types](https://datatypes.net) - another file extension search engine
+- [ICS File Extension Search](https://github.com/ISSVS/ICSExtearch) - Powershell script to search on a system for common ICS file extensions. Sources this list from here.
 
 ## Default Password Lists