Customize Highlight Styles

[M-Change]

Describe the feature

Enable customized edge and node highlight styles.
Currently, node and edge styles can be changed by passing EdgeStyle and NodeStyle classes.
It would be great so also do that with the highlighting when selecting a node or edge.

Use case or motivation

It should be possible to override the dump() method of the EdgeStyle or NodeStyle class and change
the selector to "edge:selected, edge.highlight" or "node:selected, node.highlight" and return custom style
elements.

Additional context

I think the reason why this is not working is that the custom styles are overwritten with
the default highlight styles in

st-link-analysis/st_link_analysis/frontend/src/components/graph.js

Line 78 in 4401e44

...STYLES[theme]["highlight"],

I think swapping line 77 with 78 would solve the issue