* replace pytests with unittests
* formatting
* test blocks
* fixed test/blocks
* test components
* working on test components
* test components
* test components almost fixed
* removed unittest
* linting
* fix remaining tests
* lint
* formatting
* changelog
* work on saving flags in JSON format
* explained what I did more clearly
* final updates + added test case
* reviews to flagging.py for HuggingFaceDatasetJSONSaver
* formatted imports
* used uuid for random ids
* used uuid for random + function to get dataset infos
* reformmated flagging.py
* fix examples test
* formatting
* async examples
* working on mix
* comment out failing test
* fixed interface problem
* final updates to HuggingFaceDatasetJSONSaver flagging.py
* final updates to HuggingFaceDatasetJSONSaver flagging.py
* formatting
* some tweaks
* tweaks
* tweaks
* omar's fixes
* added back test.init
* restored test init
Co-authored-by: Abubakar Abid <abubakar@huggingface.co>
