add perscription object

Frontend/patient_manager/lib/objects/perscription.dart

@@ -0,0 +1,65 @@
+class Perscription {
+  final String name;
+  final String unit;
+  final String form;
+  final String fullForm;
+  final String quantity;
+  final String dosage;
+  final String times;
+  final String days;
+  final String repeats;
+
+  const Perscription({
+    required this.name,
+    required this.unit,
+    required this.form,
+    required this.fullForm,
+    required this.quantity,
+    required this.dosage,
+    required this.times,
+    required this.days,
+    required this.repeats,
+  });
+
+  factory Perscription.fromJson(Map<String, dynamic> json) {
+    return switch (json) {
+      {
+        "name": String name,
+        'unit': String unit,
+        'form': String form,
+        'fullForm': String fullForm,
+        'quantity': String quantity,
+        'dosage': String dosage,
+        'times': String times,
+        'days': String days,
+        'repeats': String repeats,
+      } =>
+        Perscription(
+          name: name,
+          unit: unit,
+          form: form,
+          fullForm: fullForm,
+          quantity: quantity,
+          dosage: dosage,
+          times: times,
+          days: days,
+          repeats: repeats,
+        ),
+      _ => throw const FormatException('Failed to load album.'),
+    };
+  }
+
+  Map<String, dynamic> toJson() {
+    return {
+      "name": name,
+      'unit': unit,
+      'form': form,
+      'fullForm': fullForm,
+      'quantity': quantity,
+      'dosage': dosage,
+      'times': times,
+      'days': days,
+      'repeats': repeats,
+    };
+  }
+}