add compartment_set in reports section + example entry for compartment set report

[darshanmandge]

Solves #12.

[cattabiani]

I let you decide about my comment. it is not blocking

[cattabiani]

I just verified: it works with:
./compartment_sets.json
compartment_sets.json
/<full-path>/compartment_sets.json

I dunno if you want to updte this to make it explicit

[mgeplf]

I just verified: it works with:

Verified with what?

As long as the relative path is resolvable with the base directory being the one where the simulation config is, it should be find-able. libsonata should return an absolute path to the file - if it doesn't it should be fixed.
For paths within config files, it's recommend never to use absolute paths, as that means the circuit isn't portable.

[cattabiani]

tested with a test I had under my hands

Ofc it is better relative. However, the full path is possible too

[darshanmandge]

Thank you both for the clarification! I will check with @ilkilic what happens in bluecellulab when I don't give "./" in compartment_set_file entry.
I made the text to make the example entry similar to what we have for the network example above. Is this fine with you both?

[mgeplf]

I will check with @ilkilic what openbraininstitute/BlueCelluLab#33 (comment) in bluecellulab when I don't give "./" in compartment_set_file entry.

If you're using libsonata to parse the files; it's a bug that would need to be fixed, imo; both ./ and <nothing> should be equivalent, and return the full path.