Dataset expectations

[niccolopetti]

This closes #16

[github-actions[bot]]

:white_check_mark: Result of Pytest Coverage

---------- coverage: platform linux, python 3.8.12-final-0 -----------	Name	Stmts	Miss	Cover
src/app/init.py	0	0	100%
src/app/main.py	67	0	100%
TOTAL	67	0	100%

~ 3 passed in 15.55s ~

[niccolopetti]

The following test suites have been created:

• clinical-data
• labelled-images
• labels

• pup

  (this list can be retrieved by great_expectations --v3-api suite list done in tests/great_expectations folder) and for each of the suites a checkpoint has been created, having the same name as the suite. To run a checkpoint the command is great_expectations --v3-api checkpoint run [name-of-the-checkpoint]

[espositoandrea]

Ok @niccolopetti thanks for both the documentation and the expectations' definitions. I'm merging this PR as all checks have passed 😄