Add contact controller

Repositories/IContactRepository.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using weddingapi.Models;
+
+namespace weddingapi.Repositories
+{
+    public interface IContactRepository
+    {
+        Task<Contact> GetContactAsync(Guid id);
+
+        Task<IEnumerable<Contact>> GetContactsAsync();
+
+        Task CreateContactAsync(Contact family);
+
+        Task UpdateContactAsync(Contact family);
+
+        Task DeleteContactAsync(Guid id);
+    }
+}