Add missing modules to Maven "plexus" overview

[ascheman]

These modules were missing in the graphics.

Additionally the modules were ordered (slightly)
lexicographically to make alignment
with apache-sources/default.xml easier.

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[Bukama]

Not sure if they are needed. I remember we removed a lot of old stuff to not be included in the diagram anymore (see #615 )

[hboutemy]

it has been intentional in the past to keep it simple, when it was a handwritten image
nowadays that it is generated, it's a choice to be done: is it really valuable? is it really "Maven sources"?

I need some time to review the visual result to decide...

[ascheman]

To be honest, I didn't check whether it is really part of Maven (but can easily do so). If these components are not part (as dependencies) of any other Maven project, they perhaps could be dropped from sources (aggregator and repo manifest) as well?

[Bukama]

it has been intentional in the past to keep it simple, when it was a handwritten image nowadays that it is generated, it's a choice to be done: is it really valuable? is it really "Maven sources"?

I need some time to review the visual result to decide...

Looking at this PR after some weeks: Did you already find some time or do you need more? (Just to have a status on this PR)

[Bukama]

@hboutemy Did you find some time to sort your thoughts?

[Bukama]

is it really "Maven sources"?

I argue that they are not. Maven committers don't have permissions for the plexus repositories. For me, the plexus artifacts are regular third party dependencies.

[hboutemy]

do as you wish:

• either consider this level of detail useful at Maven level
• or simplify, keeping just "components" without details with a link to https://codehaus-plexus.github.io/ because this is where details are to be maintained

I won't fight any choice: it's a matter of taste, given the schema is now generated, every option is maintainable

I have a personal preference for the simplified view because we already have much in the schema at https://maven.apache.org/scm.html

think about what will help other the most in the future:

• complete but complex
• incomplete but simpler, to feel the structure