Add a merge request documentation

What does this MR do and why?

• Modified the table of contents: How to contribute is now split into Basics and How to create a merge request
• Sneaked my author name into the testing documentation
• Created the document How to create a merge request

How to set up and validate locally

Execute the merge request pipeline

added typedocumentation label

requested review from @kristina.mazur

If you like to see how your documentation looks on the website, follow the instructions on https://git.rwth-aachen.de/unicado/unicado.gitlab.io before and run mkdocs serve

resolved all threads

Thanks for the remarks

added 1 commit

• 4bfc518a - Implemented remarks

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added 1 commit

• 63157eec - Test how to review a merge request

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added 1 commit

• 9222fd97 - Test the comment functionality

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resolved all threads

added 1 commit

• a3bbb5d6 - Nice :)

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added 1 commit

• b23a720f - Minor adaptions to make it more steamlined

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approved this merge request