RFR: 7831: Add new view for hierarchical edge bundling [v15]

[Marcus Hirt]

On Fri, 5 Aug 2022 23:29:07 GMT, Brice Dutheil <duke at openjdk.org> wrote:

>> Joint effort with @cimi to provide _hierarchical edge_ visualization to JMC.
>> 
>> ![Hierarchical Edge view](https://user-images.githubusercontent.com/803621/176186654-04f458f5-6f7d-4755-822c-f63e53ccfc31.png)
>> 
>> Here when the mouse hovers `java.util.concurrent` on the bottom right. One can see the relations with other packages.
>> 
>> 
>> Based on the preliminary work of @cimi here : https://observablehq.com/@cimi/jfr-graph-hierarchical-edge-bundling
>
> Brice Dutheil has updated the pull request incrementally with two additional commits since the last revision:
> 
>  - Set default package depth in dependency view to 2
>  - Increase contrast on dependency view icons

Hi @bric3 - you should be able to /integrate now.

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PR: https://git.openjdk.org/jmc/pull/405