MonarchV3 Get Mappings

Get cross-ontology mappings for a biomedical entity from the Monarch Initiative. Returns equivalence mappings between ontology identifiers, such as MONDO to OMIM, ICD10, SNOMED CT, NCIT, MESH, DOID, and Orphanet. Useful for translating disease identifiers across coding systems (e.g., for clinical data integration, ICD-10 billing codes, or linking to OMIM entries). Example: MONDO:0005148 (type 2 diabetes) maps to ICD10CM:E11, DOID:9352, OMIM:125853, MESH:D003924.