Add visualisation of check types to the codechecker table

[nuest]

#71 created a nice tabular view of all codecheckers.

We could add a column that visualises the type of contributions/types by adding a stacked bar chart using the number of checks of each type, colouring the bar using the type.

Start with R packages for tables, see https://medium.com/@jchen001/top-r-packages-for-beautiful-table-visualization-54af8185d493