add new decoding to cyberchef

Hi would you please add this decoding operation to cyberchef

https://en.wikipedia.org/wiki/Iran_System_encoding

https://github.com/mohsen-d/IranSystemConvertor/blob/master/IranSystemConvertor/ConvertTo.cs

https://github.com/vahidrezazadeh/iransystemjs/blob/master/iranSystem.js

Thanks