add supplier repo and suppliercreationdto

AB.Persistence/RepoDbContext.cs

@@ -1,10 +1,5 @@
 using AB.Domain.Entities;
 using Microsoft.EntityFrameworkCore;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 
 namespace AB.Persistence;
 
@@ -12,7 +7,7 @@ public sealed class RepoDbContext : DbContext
 {
 
     public RepoDbContext(DbContextOptions options)
-        : base (options)
+        : base(options)
     {
     }