update user guide / website

Some changes to the source code have not yet been updated in the User Guide:

• Check all code snippets (if they still correspond to the current code, for example args in plotters)
• Replace plots with the version using aixd-colors (after !163 (merged) merged) - in chapters: Getting started, ML model, Plotter
• Update "# Error during generation" snippet block in ML model section
• Warning block in Plotter about datablocks

changed milestone to %v1.0.0

changed the description

added documentation label

created branch 184-update-user-guide-website to address this issue

mentioned in commit 4d3e40d5

mentioned in commit e8357f89

marked the checklist item Update "# Error during generation" snippet block in ML model section as completed

marked the checklist item Warning block in Plotter about datablocks as completed

mentioned in merge request !174

@ania I updated the images in the user guide. (Only on the sensitivity analysis I did not update the images as here I found a bug (already sent to Konstantinos) so I cannot generate the correct sensitivities atm)

What about the schematic representations of the CVAE etc. should we also make this aligned with the paper? In my opinion we just have to change this one: (sample part is different in the paper, but also Input/OutputML vs Input/Targets

marked the checklist item Replace plots with the version using aixd-colors (after !163 (merged) merged) - in chapters: Getting started, ML model, Plotter as completed

marked the checklist item Check all code snippets (if they still correspond to the current code, for example args in plotters) as completed

mentioned in commit 2002c373