ICD integration

[dgrudinin]

1. Must be able to load ICD data directly using official WHO API: https://icd.who.int/icdapi (with caching)
2. Must be able to load ICD data from local storage
3. Must be able to switch between ICD versions (available 2 versions: ICD10 and ICD11)
4. Must store classifier information in disease
5. Must be able to select TBD