refactor(fakeData): KAM-331: Create fake-data package

[tcodling]

Changes

As part of our testing project for creating a synthetic environment, we have decided to pull out the logic for populating a DB instance with data used in determinism testing into its own package fake-data. This will be used for both determinism testing and will be used in the future to populate the synthetic test environment + any other use case for generating fake data.

• Create new package fake-data
• Move over the functions for populating the DB for determinism testing from /scripts to the new package
• Split up into functions that create various groups of linked data roughly in line with how they would be made realistically
  • Introduced some parameters with randomness

Determinism testing was done and passed in a pr branched off this with dummy migration #7264

Deploys

• Deploy to Tamanu Internal

Remember to...

• ...write or update tests
• ...add UI screenshots and testing notes to the Linear issue
• ...add any manual upgrade steps to the Linear issue
• ...update the config reference, settings reference, or any relevant runbook(s)
• ...call out additions or changes to config files for the deployment team to take note of

[tcodling]

All files in this directory are helper functions built out of the original logic in the old scripts/src/fake.ts

[tcodling]

Generate one of each import data types to be used for foreign key relationships when making clinical data

[tcodling]

On the fence if I should have this file with all import data, or split it up amongst the other files in this directory in new functions

[passcod]

I could see it either way or both but let's just have it all in here for now for simplicity.

[tcodling]

I have done some simple randomness here but am a bit on the fence about how far I should take it

Do you think some relatively simple randomness like this is fine? Or do you think it is worth doing what we were talking about where you mentioned taking in a range or number and using that to generate the random number. Its easy enough to do but am a little worried about over-engineering 🤔

[passcod]

Nah the way you've got it is fine. We can always make it customisable later if we feel like it.