Add graphs to HTML report

[simonschiller]

Feature description

The HTML report should contain a separate section with graphs that visualize the data. There are a lot of graphs we could create, but I think we should keep it basic in the initial version. We can always expand and add additional graphs later on.

Some ideas of graphs (not all of which necessarily make sense):

• Contribution per component
• Distribution of resource types (bytes and file count)
• Split between internal and external components
• ...

Reasoning

Right now, we only have a list of components in the report. Having a visual representation of the data should make it easier to analyze and draw conclusions from it.