Refactor the ehr-definitions logic to Typescript

[viniciusarre]

This issue is for addressing the refactor of the Javascript logic on ehr-definitions to Typescript.

Context:

The ehr-definitions contains logic that is reused between the client and the server. It has a lot of definitions and business logic for all the components which are used in the front-end and generated on static pages.

The code encapsulates some of the core issues in the app, therefore, we need t make it more maintainable and testable. Therefore we believe that using typescript is a good way to approach that.

Feel free to extend the docstrings as you go and improve the tests to reflect your change.

Make sure that all tests are passing before pushing the code, as well as that the inside code is generated properly. Please check the code_generation guidelines for that.