Entity tree view

[becomingbabyman]

• [x] enter a d/entity lookup in an input
• [x] if an entity is found return it as A V pairs in a table
• [x] include reverse refs to the entity in the the A V pairs too
• [x] make ref values into toggles that expand the entity or set of entities into a nested list like a file tree
  • [x] expanding a cardinality one ref should show the whole entity
  • [x] expanding a cardinality many ref should show a list of entities sorted by :db/id that can then be expanded as individual entities
• [x] refactor the tree-table view into its own component