Move pre-processing helper functions into the main package

[milanmlft]

Definition of Done / Acceptance Criteria

Relevant functions currently living in the dev/omop_analyses/ scripts have been moved into R/

Testing

• Add unit tests for the relevant functions

Documentation

• Properly document functions with roxygen comments

Dependencies

No response

Details and Comments

Thinking more about this, it might make sense to move the helper functions from analyse_omop_cdm.R into the package. That way they can be easily unit tested and reused in other pre-processing scripts. I'll make a new issue for that.

Originally posted by @milanmlft in #32 (comment)

[linear]

SAF-656 Move pre-processing helper functions into the main package

Definition of Done / Acceptance Criteria

Relevant functions currently living in the dev/omop_analyses/ scripts have been moved into R/

Testing

• Add unit tests for the relevant functions

Documentation

• Properly document functions with roxygen comments

Dependencies

No response

Details and Comments

Thinking more about this, it might make sense to move the helper functions from analyse_omop_cdm.R into the package. That way they can be easily unit tested and reused in other pre-processing scripts. I'll make a new issue for that.

_Originally posted by @milanmlft in #32 (comment)