Refactor Bangladesh Address Code Systems and Profiles

- Deleted the bdAddressCS code system file as it was no longer needed.
- Updated the division extension to accept string values instead of CodeableConcept.
- Created a new extension for Upazillas to standardize their representation in addresses.
- Modified the patient profile to include address constraints specific to Bangladesh, including the new Upazilla extension and district value set.
- Renamed the bdAddress profile to BDAddress for consistency and clarity.

input/fsh/codeSystems/bdAddressCS.fsh

@@ -1,58 +0,0 @@
-CodeSystem: BDAddressCS
-Id: bd-address-cs
-Title: "Bangladesh Address Codes"
-Description: "Bangladesh Address Codes"
-* ^url = "https://fhir.dghs.gov.bd/core/CodeSystem/bd-divisions"
-* #30 "Dhaka"
-* #20 "Chattogram"
-* #50 "Rajshahi"
-* #55 "Rangpur"
-* #40 "Khulna"
-* #10 "Barishal"
-* #60 "Sylhet"
-* #45 "Mymensingh"
-* #3026 "Dhaka"
-
-
-ValueSet: BDDivisionsVS
-Id: bd-division-code-vs
-Title: "Bangladesh Division ValueSet"
-Description: "Bangladesh Division Codes (only two-digit codes)"
-* ^url = "https://fhir.dghs.gov.bd/core/ValueSet/bd-divisions"
-
-// include only codes that are exactly 2 digits
-* include codes from system https://fhir.dghs.gov.bd/core/CodeSystem/bd-divisions
-    where code regex "^[0-9]{2}$"
-
-
-ValueSet: BDDistrictVS
-Id: bd-district-code-vs
-Title: "Bangladesh district ValueSet"
-Description: "Bangladesh district Codes (only two-digit codes)"
-* ^url = "https://fhir.dghs.gov.bd/core/ValueSet/bd-districts"
-
-// include only codes that are exactly 2 digits
-* include codes from system https://fhir.dghs.gov.bd/core/CodeSystem/bd-districts
-    where code regex "^[0-9]{4}$"
-
-
-ValueSet: BDCityCorporationVS
-Id: bd-city-corporations-code-vs
-Title: "Bangladesh district ValueSet"
-Description: "Bangladesh district Codes (only two-digit codes)"
-* ^url = "https://fhir.dghs.gov.bd/core/ValueSet/bd-city-corporations"
-
-// include only codes that are exactly 2 digits
-* include codes from system https://fhir.dghs.gov.bd/core/CodeSystem/bd-city-corporations
-    where code regex "^[0-9]{6}$"
-
-
-ValueSet: BDUpazillaVS
-Id: bd-upazilla-code-vs
-Title: "Bangladesh district ValueSet"
-Description: "Bangladesh district Codes (only two-digit codes)"
-* ^url = "https://fhir.dghs.gov.bd/core/ValueSet/bd-upazilla"
-
-// include only codes that are exactly 2 digits
-* include codes from system https://fhir.dghs.gov.bd/core/CodeSystem/bd-upazilla
-    where code regex "^[0-9]{8}$"