Use iatikit on a specified xml file of activities to use instead of registry activities

[matmaxgeds]

Is your feature request related to a problem? Please describe.

I was wondering about using iatikit to explore the OECD CRS xml data, or the xml output of one of the datastore which might e.g. have added currency conversation to USD.

Describe the solution you’d like

I can pass iatikit an alternative source of activities which it then ingests - I suspect I might be able to do this by getting it to download the registry, and then replacing the activities files manually in the downloaded folder?

Describe alternatives you’ve considered

There are not alternatives to iatikit! I could try and recreate any differences e.g. USD conversations to the iatikit output etc