Moved interfaces, created new folders for visa requests and handlers

SchengenVisaApi/ApplicationLayer/VisaApplications/Models/PlaceOfWorkModel.cs

@@ -0,0 +1,13 @@
+namespace ApplicationLayer.VisaApplications.Models;
+
+public class PlaceOfWorkModel
+{
+    /// Name of hirer
+    public string Name { get; set; } = null!;
+
+    /// <see cref="AddressModel"/> of hirer
+    public AddressModel Address { get; set; } = null!;
+
+    /// Phone number of hirer
+    public string PhoneNum { get; set; } = null!;
+}