[jdk20] RFR: 8298050: Add links to graph output for javadoc [v2]

[Per Minborg]

> This PR proposes adding hyperlinks to the sealed graphic layout making navigation much simpler via the image.

Per Minborg has updated the pull request incrementally with one additional commit since the last revision:

  Use package for navigation

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Changes:
  - all: https://git.openjdk.org/jdk20/pull/23/files
  - new: https://git.openjdk.org/jdk20/pull/23/files/6521807f..b4e0ce0f

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk20&pr=23&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk20&pr=23&range=00-01

  Stats: 17 lines in 1 file changed: 4 ins; 3 del; 10 mod
  Patch: https://git.openjdk.org/jdk20/pull/23.diff
  Fetch: git fetch https://git.openjdk.org/jdk20 pull/23/head:pull/23

PR: https://git.openjdk.org/jdk20/pull/23