Logger add modules reader

Currently, the logger is able to write some data from the chemistry and star formation modules, but not read them.

In this merge request, I am implementing the reading part. To do so, I had to change the way we deal with the fields and I implemented a new structure called field_information that contains the indices of the field (and its derivative) in the module and global arrays.

I have also tried to reduce a bit the copy/paste in the main code by using some preprocessing macro.

By the way, SPHENIX is not working anymore (I will fix it in a next merge request) as the number of masks is now too large (I just need to merge together some fields). My next steps are: finish !1256 (merged), merge everything and then change the name of the logger into Continuous Simulation Data Stream (I will use csds in the code).

changed milestone to %Continuous Simulation Data Stream

added i/o label

mentioned in issue #737 (closed)

I will not have time to look at this before next week as I am conferencing. If you want to fix the number of masks then you can do it already here before that.

I am planning to deal with #724 (closed) and SPHENIX together. Therefore it would be better to have a separate merge request as it could involve a "large" number of changes.

mentioned in merge request !1266 (merged)

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• 9c48943b - Apply first review

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I have implemented all your suggestions.

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• 6e9b984e - 2nd review

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I have updated the code with your comments.