RFR: 7831: Add new view for hierarchical edge bundling [v2]

[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 eight additional commits since the last revision:

 - Rebuild dependency chart when window is resized
 - Resize chart on update; hide debug logs in html
 - Set minimum innerRadius for chord diagram to 100px
 - Update dependency chart on chart type change
 - Use tabs for indentation in JS files, auto-reformat
 - Add JS code for chord diagram and ability to switch from edge-bundling
 - Add icons in toolbar to switch between different chart types
 - Extract JS utility functions in separate file

-------------

Changes:
  - all: https://git.openjdk.org/jmc/pull/405/files
  - new: https://git.openjdk.org/jmc/pull/405/files/64f3602c..ad2eda4b

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jmc&pr=405&range=01
 - incr: https://webrevs.openjdk.org/?repo=jmc&pr=405&range=00-01

  Stats: 646 lines in 10 files changed: 405 ins; 230 del; 11 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