RFR: 7831: Add new view for hierarchical edge bundling [v12]

[Brice Dutheil]

> 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 one additional commit since the last revision:

  Update .gitignore, remove .sdkmanrc

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Changes:
  - all: https://git.openjdk.org/jmc/pull/405/files
  - new: https://git.openjdk.org/jmc/pull/405/files/710f4066..49054481

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jmc&pr=405&range=11
 - incr: https://webrevs.openjdk.org/?repo=jmc&pr=405&range=10-11

  Stats: 4 lines in 2 files changed: 0 ins; 3 del; 1 mod
  Patch: https://git.openjdk.org/jmc/pull/405.diff
  Fetch: git fetch https://git.openjdk.org/jmc pull/405/head:pull/405

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