add icd 10 ibject and api call

Frontend/lib/mih_objects/icd10_code.dart.dart

@@ -0,0 +1,23 @@
+class ICD10Code {
+  final String icd10;
+  final String description;
+
+  const ICD10Code({
+    required this.icd10,
+    required this.description,
+  });
+
+  factory ICD10Code.fromJson(Map<String, dynamic> json) {
+    return switch (json) {
+      {
+        "icd10": String icd10,
+        'description': String description,
+      } =>
+        ICD10Code(
+          icd10: icd10,
+          description: description,
+        ),
+      _ => throw const FormatException('Failed to load icd10 code object.'),
+    };
+  }
+}