update adjacency plotting for michael

[bdpedigo]

• [] clustering adjacency with the dendrogram on the borders
• [] left/right adjacency
• [] axon/dendrite adjacency

[bdpedigo]

for figure 2 (axon/dendrite):

• sort by cluster
• sort clusters by whatever flow sorting we decide on
• don't show cluster ids yet
• squash L/R somehow, like intercalate L/R pair maybe
• sort pairs within cluster by the same flow sorting

for figure 3 (clusters):

• same as the above, just with the summed graph

for figure 5 (l/r):

• sort first by hemisphere
• sort within hemisphere by cluster, clusters ordered by flow sorting
• (try) to sort pairs the same way within cluster - not sure what to do about unpaired
• sort pairs by same flow sorting, with unpaired neurons after the paired within a cluster