Added on type hint

Reviewed for comments and type hints

Checked type hints

Tidied up generate_data.py

Updated from using random.choices to random.sample throughout where I need a random distinct set as choices does replacement so you can get the same item twice. Discovered in pricing testing.

Tweaked the test generator and updated the tests

Added the test question generator and increased the size of the question bank to 500

Fixed less than/greater than bug where I was dropping the wrong reviews to achieve a target average review. Update the sql data set too.

Added the script to shape the data for testing and the associated sqlite containg the test data

Tidied up comments

Updated naming convention for dataset databases to be clearer.

Fixed bugs in the dataload process with referencing the new json folder and then looking up the available databases.

Updated the dataloader to ignore case on product features. Note have deliberately not harmonised product feature capitalisation or similar features as this "messiness" is representative of real organisational data.

Fixed a bug in generate data where it didn't reference the json folder in the new file sructure

Added the scripts which were used to build the dataset to the repo, and tweaked to use common code