refactor: ♻️ standerdize filenames and profile names

input/fsh/codeSystems/BBImmunizationReactionCS.fsh

@@ -0,0 +1,20 @@
+CodeSystem: BDImmunizationReactionCS
+Id: bd-immunization-reaction
+Title: "Bangladesh Immunization Reaction Code System"
+Description: "Codes for adverse reactions after vaccination in Bangladesh."
+* ^url = "https://fhir.dghs.gov.bd/core/CodeSystem/bd-immunization-reaction"
+* ^status = #active
+* ^content = #complete
+
+* #NONE "No Reaction"
+    "No adverse reaction observed after vaccination."
+* #FEVER "Fever"
+    "Elevated body temperature following vaccination."
+* #SWELLING "Swelling"
+    "Local swelling at the injection site."
+* #RASH "Rash"
+    "Generalized or localized rash after vaccination."
+* #ANAPHYLAXIS "Anaphylaxis"
+    "Severe immediate allergic reaction following vaccination."
+* #OTHER "Other Reaction"
+    "Any other adverse reaction not categorized above."