New plot() doesn't handle custom edge_color and node_color

[oneilsh]

The updated plot function is having trouble changing scales to other columns.

filename <- system.file("extdata", "eds_marfan_kg.tar.gz", package = "monarchr")
g <- file_engine(filename) |>
    fetch_nodes(query_ids = "MONDO:0007525") |>
    expand(predicates = "biolink:has_phenotype",
           categories = "biolink:PhenotypicFeature")

On this example plot(g, edge_color = original_subject) produces a couple of warnings and no edge coloring, plot(g, edge_color = frequency_qualifier) no warning but all edges colored by NA.

Tagging @bschilder :)