Implement a feature to replace the free-text provisional diagnosis field with a structured selection of diagnoses based on SNOMED CT codes. This will ensure standardization and improve diagnosis accuracy.

Acceptance Criteria:

1. Provisional diagnosis should be selectable from a list of SNOMED CT codes.

1. The system should auto-suggest relevant SNOMED CT terms as the user types.

1. The free-text entry field for provisional diagnosis should be removed.

1. Dropdown can show by typing the words.