[📚 Documentation Issue]: Chapter "includes"

[Simone-de-Rijke]

Preliminary Checks

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Documentation Section

Readme

Issue Description

Issue #312 should be taken care of before this one.

After the documentation header insert a section called "includes" and make a general overview of different eurocode checks including a traffic light stating it is either implemented, in progress or none of the above. This page can be use as an example https://github.com/ritchie46/anaStruct

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