Convert mod_articles_archive to new structure

[carlitorweb]

Summary of Changes

This PR converts mod_articles_archive to the new structure

Testing Instructions

• Use Joomla 4.3
• Create an instance of the module Articles - Archived. Note how it works.
• Apply patch
• Delete administrator/cache/autoload_psr4.php
• Refresh the page, make sure the module still displays the same as before.

Additional comments

A small change to the layout was made. Now will show the amount of articles the month have archived, for example:

Before patch:
December, 2022

After patch:
December, 2022 (1)

If is not allowed, let me kown and I revert the change

[carlitorweb]

@laoneo the name of the method getArticles() do not describe really the purpose of the method. Can be changed for this module to something like getMonths() for example?

[laoneo]

Sure, change it. More accurate names are always better...

[sandewt]

Thanks for the hint, can you make a new pr for this?

I noticed even more details in the already modified modules. I think it would be useful to change those as well, so that they become more consistent. But first gain some more experience with the modules.