rewrite style guide recommendations

Generalisieren; "For Specific Programming Languages" reduziere zu inline Aufzählung mit direkten links
2.1.4 shall just have recommendations, but it needs to be said that this are not mandatory, just hints if there is no styleguide chosen yet for a project.
also the "we" and "fe" needs to be removed

Edited Nov 26, 2024 by Ubbo Veentjer

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