add p8 and lab8

sum23/labs/lab8/README.md

sum23/labs/lab8/images/README.md

sum23/labs/lab8/images/gradescope.png

sum23/labs/lab8/practice.ipynb

sum23/labs/lab8/practice_test.py

sum23/labs/lab8/small_mapping.csv

sum23/labs/lab8/small_movies.csv

sum23/projects/p8/README.md

sum23/projects/p8/images/README.md

sum23/projects/p8/images/add_group_member.png

sum23/projects/p8/images/gradescope.png

sum23/projects/p8/mapping.csv

sum23/projects/p8/movies.csv

sum23/projects/p8/p8.ipynb

sum23/projects/p8/p8_test.py

sum23/projects/p8/rubric.md

sum23/projects/p8/small_mapping.csv

sum23/projects/p8/small_movies.csv