[PM-7452] Handle PayPal for premium users (#4835)

* Add PremiumUserSale

* Add PremiumUserBillingService

* Integrate into UserService behind FF

* Update invoice.created handler to bill newly created PayPal customers

* Run dotnet format

src/Core/Billing/Models/Sales/PremiumUserSale.cs

@@ -0,0 +1,49 @@
+using Bit.Core.Entities;
+using Bit.Core.Enums;
+using Bit.Core.Models.Business;
+
+namespace Bit.Core.Billing.Models.Sales;
+
+#nullable enable
+
+public class PremiumUserSale
+{
+    private PremiumUserSale() { }
+
+    public required User User { get; set; }
+    public required CustomerSetup CustomerSetup { get; set; }
+    public short? Storage { get; set; }
+
+    public void Deconstruct(
+        out User user,
+        out CustomerSetup customerSetup,
+        out short? storage)
+    {
+        user = User;
+        customerSetup = CustomerSetup;
+        storage = Storage;
+    }
+
+    public static PremiumUserSale From(
+        User user,
+        PaymentMethodType paymentMethodType,
+        string paymentMethodToken,
+        TaxInfo taxInfo,
+        short? storage)
+    {
+        var tokenizedPaymentSource = new TokenizedPaymentSource(paymentMethodType, paymentMethodToken);
+
+        var taxInformation = TaxInformation.From(taxInfo);
+
+        return new PremiumUserSale
+        {
+            User = user,
+            CustomerSetup = new CustomerSetup
+            {
+                TokenizedPaymentSource = tokenizedPaymentSource,
+                TaxInformation = taxInformation
+            },
+            Storage = storage
+        };
+    }
+}

src/Core/Billing/Models/TaxInformation.cs

@@ -1,4 +1,5 @@
-using Stripe;
+using Bit.Core.Models.Business;
+using Stripe;
 
 namespace Bit.Core.Billing.Models;
 
@@ -11,6 +12,15 @@ public record TaxInformation(
     string City,
     string State)
 {
+    public static TaxInformation From(TaxInfo taxInfo) => new(
+        taxInfo.BillingAddressCountry,
+        taxInfo.BillingAddressPostalCode,
+        taxInfo.TaxIdNumber,
+        taxInfo.BillingAddressLine1,
+        taxInfo.BillingAddressLine2,
+        taxInfo.BillingAddressCity,
+        taxInfo.BillingAddressState);
+
     public (AddressOptions, List<CustomerTaxIdDataOptions>) GetStripeOptions()
     {
         var address = new AddressOptions