Prepare 0.4.0: DGDA Drug and LOINC Integration

input/fsh/valueSets/BDDGDADrugsVS.fsh

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+ValueSet: BDDGDADrugsVS
+Id: dgda-registered-drugs
+Title: "DGDA Registered Drugs Value Set"
+Description: """
+Value set containing all registered drug products from the Drug Registration
+Authority (DGDA) of Bangladesh. This value set includes 39,196 finished
+pharmaceutical drug product concepts maintained in the national OCL terminology
+server at https://tr.ocl.dghs.gov.bd.
+
+This value set is the normative binding for `BDMedication.code` and represents
+the only permitted drug coding vocabulary for medication resources in the
+Bangladesh national health information exchange.
+
+Validation is performed via `$validate-code` and `$lookup` against the national
+OCL terminology server. `$expand` is not supported for this value set due to its
+size.
+
+**Source collection:** dgda-registered-drugs-valueset (MoHFW organisation, OCL)
+**OCL collection canonical:** https://dgda.gov.bd/fhir/ValueSet/registered-drugs
+**OCL FHIR endpoint:** https://tr.ocl.dghs.gov.bd/orgs/MoHFW/collections/dgda-registered-drugs-valueset/
+"""
+
+* ^url = "https://dgda.gov.bd/fhir/ValueSet/registered-drugs"
+* ^version = "v1.0.0"
+* ^status = #active
+* ^experimental = false
+* ^publisher = "Directorate General of Drug Administration (DGDA), Government of Bangladesh"
+* ^contact.name = "DGHS Health Informatics Unit"
+* ^contact.telecom.system = #url
+* ^contact.telecom.value = "https://dghs.gov.bd"
+* ^jurisdiction = urn:iso:std:iso:3166#BD "Bangladesh"
+* ^immutable = false
+
+* include codes from system "https://dgda.gov.bd/drug-registry"