Adding AICHA atlas to xcpEngine

[LeSasse]

Hi,

First of all, thank you for providing this useful software to the community. I have seen you added some custom atlases on request in #206 and I was wondering if it is possible to include the AICHA atlas with 384 ROIs (Publication: https://pubmed.ncbi.nlm.nih.gov/26213217/) in the container. The files are available here: https://www.gin.cnrs.fr/en/tools/aicha/. If it makes it easier, I can prepare the files in a similar format to what I can see in your repository, and make a pull request for you to review?

Thanks very much,,

Leo

[a3sha2]

yes Leo