Create horizontal stacked bar charts plot without financial data

[lindadelacombaz]

Closes #81. Dear @maurolepore, I have created a new function that revisits the previous bar plots, as horizontal stacked bar plots instead of the vertical ones. I know that the xctr name is depreciated, but I am waiting for the "official" toy data set so I make a large refactoring in the tiltPlot package in a subsequent PR.

Thank you for your time ! :)

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