[Add] MasterData Services.

AMREZ.EOP.Domain/Entities/MasterData/Province.cs

@@ -0,0 +1,11 @@
+namespace AMREZ.EOP.Domain.Entities.MasterData;
+
+public class Province : MasterBase
+{
+    public string Code { get; set; } = null!;
+    public ICollection<District> Districts { get; set; } = new List<District>();
+}
+
+public class ProvinceBlock : MasterBlockBase
+{
+}