feat: added Plotter class for plotting

src/Plotter.py

+import numpy as np
+import matplotlib.pyplot as plt
+import pandas as pd
+from .Dataset import Dataset
+
+class Plotter:
+    def __init__(self, dataset: Dataset):
+        self.df = dataset.get_dataframe()
+    
+    def plotCategoricalBarChart(self, category1, category2, title):
+        ct = pd.crosstab(self.df[category1], self.df[category2])
+        ct_percent = ct.apply(lambda r: r/r.sum() * 100, axis=0) # Calculate percentages by row
+        fig, ax = plt.subplots()
+        ax.set_title(title)
+        ct_percent.plot(kind='bar', ax=ax)