As a public site user, I want a tab where I can list and sort other people related to a person, so I can understand their interpersonal relationships throughout the PGP.

[x] Navigate to the person list page, sort by related people, descending. Click on some people with related people. The number of related people in the table should reflect the number that appears on the person page's navigation tab for Related People.
[x] Click the Related People tab. This should take you to a list of people with relation type, number of shared documents, and notes.
[x] The list should be sortable by name, relation type, and number of shared docs
[x] The shared docs number should be correct
[x] The relation type entry in the table should reflect all entered relationships between the two people
[x] People with person pages should be linked in the table

Note that this issue is only covering the list/sorting, not the interactive network graph.

Princeton-CDH / geniza