Support for data tracked in Bonsai

[sfmig]

It would mean adding a loader function to load points (centroid of a blob?) tracked by Bonsai.

We would need:

• an example file (we have one from Dario but we don't know if it is standard)

Questions:

• in Bonsai, is there a standard format to export data or do users define the header of the csv? (@lochhh may know this already)
• if there is a standard, does it change between Bonsai versions?

See also #308

[roaldarbol]

I've got a Bonsai reader in animovement, the code is here: https://github.com/roaldarbol/animovement/blob/main/R/read_bonsai.R

And the sample data - would be good to compare and see if they follow the same format (the relevant columns contain Centroid): https://github.com/roaldarbol/animovement/blob/main/tests/data/bonsai/LI850.csv

Bonsai also allows multiple ROIs which I'm not supporting yet (the data above has 6 ROIs if I remember correctly); the data structure really seems to depend on the workflow. I'm sure it can be dealt with with some regex, but I haven't attempted yet.