Implement a better way to import Kanta Lab Tests data files in Risteys

[vincent-octo]

Currently process is a bit cumbersome:

• Start an iex -S mix session
• Check the README.ascii file for the import steps
• For each import step:
  • check which import function to call. Then cross-reference its argument to the data files.
  • Call that function.
  • Update the data file names with the XXH64 tag