(main) Port fixes for maven-site breadcrumbs from v2.2.x #763

[abelsromero]

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What kind of change does this PR introduce? (check at least one)

• Bugfix for converter-doxia-module which is the continuation of the previous one.
• Feature for the new parser-doxia-module
• Documentation
• Refactor
• Build improvement
• Other (please describe)

What is the goal of this pull request?

Port fixes for #763 from branch v2.2.x to main (v3.0.x).

Are there any alternative ways to implement this?

I found out parser-doxia-module is going to need a new implementation different from v2.2.x 😞 . The later it is portable to converted-doxia-module only. I could refactor the fix into re-usable code shared in the "commons" module. To avoid users of the asciidoctor-maven-plugin pulling doxia dependencies, I added the required doxia-sink-api as provided, but I admit that's a quick-hack.
Eventually, we'd need a "commons" only for site modules.

Are there any implications of this pull request? Anything a user must know?

No

Is it related to an existing issue?

• Yes Missing breadcrumb name in maven site module #763
• No

Finally, please add a corresponding entry to CHANGELOG.adoc

I am adding this as a bug fix since it was present previously