created docstrings for conditional quantile plot

.../_source/_plots/conditional_quantiles_cali-ref_plot-2.png

.../_source/_plots/conditional_quantiles_cali-ref_plot-3.png

docs/_source/_plots/conditional_quantiles_cali-ref_plot.png

.../_source/_plots/conditional_quantiles_like-bas_plot-2.png

.../_source/_plots/conditional_quantiles_like-bas_plot-3.png

docs/_source/_plots/conditional_quantiles_like-bas_plot.png

src/helpers.py

src/helpers/time_tracking.py

src/plotting/postprocessing_plotting.py