Graph: Supporting custom functions for node rendering; onRenderComplete callback

[rokotyan]

This PR will allow the users to come up with their own node rendering functions, which will be a pretty common use case for everyone designing their own graphs.

It also add the onRenderComplete callback which allows you to do even more, e.g. add custom background / foreground graphics.

https://github.com/f5/unovis/assets/755708/cd36d1c5-891e-4af9-9c9e-c2a54dd5723a

[lee00678]

Do we need to add documentation for this?

[rokotyan]

@lee00678 Yes, definitely. And probably a new example. I feel like it's a pretty big feature so we might want to present it properly.

[rokotyan]

Latest commits summary:

Reworking node selection and state update logic

• New Config property: nodeSelectionHighlightMode to control what to dim / highlight on node selection
• Fix: Node and link state was set after render
• Refactor: Removed unnecessary render calls
• Refactor: Renamed state-related rendering functions (updateNodesPartial, updateLinksPartial)

[rokotyan]

@reb-dev (cc @lee00678) After some more local testing, I think I need to make the updateNodesPartial function configurable as well. Otherwise some of the styles might get overridden. Also to give you a heads up, I might need to move the logic around using s.nodeSelectors.brushed class there because it aligns better with what we have for grayed out and selected states.

[rokotyan]

@reb-dev I've pushed a few new commits and tested them on my end, everything seems to be working well. I'm a bit concerned about this change because I don't remember why I did it that way initially. It would be great if you could test it with your existing graphs and let me know if everything still looks good. You can use 1.5.0-nikita.1 version to test which has all the changes from this PR.

[rokotyan]

No worries, thanks @reb-dev