Remove all the inline "style" in AMT HTML elements

[robbertbos]

Description

It is a bad practice to add the "style" into the HTML elements directly, but this has been introduced by the crunch week before the demo. Integrate them in the .css files (which potentially should be more logically grouped into different .css files) and where necessary make our own NL-Design System components as they are too different from RVO (hence why we introduced the overwrite with the style elements)

Implementation notes

• Make several CSS files
• Create own css classes

[github-actions]

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[robbertbos]