refactor: ♻️ standerdize filenames

input/fsh/codeSystems/BDIdentifierType.fsh

@@ -0,0 +1,21 @@
+//// this code systems for Identifier types
+
+CodeSystem: BangladeshIdentifierType
+Id: bangladesh-identifier-type-cs
+Title: "Bangladesh Identifier Types"
+* ^url =  "https://fhir.dghs.gov.bd/core/CodeSystem/bd-identifier-type"
+
+* #NID "National ID"
+* #BRN "Birth Registration Number"
+* #UID "Unique ID"
+
+
+ValueSet: BangladeshIdentifierTypeVS
+Id: bangladesh-identifier-type-vs
+Title: "Bangladesh Identifier Type"
+Description: "Bangladesh Standard Identifier type"
+* ^url =  "https://fhir.dghs.gov.bd/core/ValueSet/bd-identifier-type"
+// * include codes from valueset http://hl7.org/fhir/ValueSet/identifier-type /// use name or uri
+* include codes from system https://fhir.dghs.gov.bd/core/CodeSystem/bd-identifier-type
+
+////////////// end identifier types