adding marmoset similarity scores

[raymond-sanchez]

This CSV contains the similarity scores used to construct the heatmaps. Let me know if this format works or if you'd like it structured differently. Some notes about the metrics:

• dist = the Euclidean distance between cluster centroids in an integrated human-marmoset-mouse space. Pairwise distances are calculated within classes (i.e. GABAergic mouse type vs. GABAergic human type)
• similarity = a reverse scaling of the dist metric (since greater distance between cluster centroids implies "less similar" types). Used on the heatmaps as this was more intuitive