Add javalib examples on using `jlink`, `jpackage`, and producing JPMS modules (500USD Bounty)

[lihaoyi]

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From the maintainer Li Haoyi: I'm putting a 500USD bounty on this issue, payable by bank transfer on a merged PR implementing this.

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These are newer Java tools that we should have documented/tested golden paths to using. The examples should go in example/javalib/module with /** Usage */ tests and textual explanations of what the examples are doing and how they relate to the underlying tools and concepts (with links to the relevant upstream documentation pages)

[lefou]

• https://github.com/com-lihaoyi/mill/pull/3201

[ayewo]

Hi @lihaoyi I've just opened a PR.

When you have a moment, would appreciate it if you could take a look.