Add plots for the fanfictions

data_overview/data_overview.csv

data_overview/data_overview.png

data_overview/delta_scores_grouped_fanfics.png

data_overview/z_scores_all_data.png

data_visualisation.py

delta_measure.py

fanfic_internal_metrics.py

...averse/freq_distribution/bad_fics_pos_tag_frequencies.png

...se/freq_distribution/bad_fics_punctuation_frequencies.png

grishaverse/freq_distribution/bad_fics_sent_len_long.png

grishaverse/freq_distribution/bad_fics_sent_len_short.png

grishaverse/freq_distribution/bad_fics_token_len.png

grishaverse/freq_distribution/canon_pos_tag_frequencies.png

...verse/freq_distribution/canon_punctuation_frequencies.png

grishaverse/freq_distribution/canon_sent_len_short.png

...verse/freq_distribution/good_fics_pos_tag_frequencies.png

...e/freq_distribution/good_fics_punctuation_frequencies.png

grishaverse/freq_distribution/good_fics_sent_len_long.png

grishaverse/freq_distribution/good_fics_sent_len_short.png

grishaverse/freq_distribution/good_fics_token_len.png