Checkout v2: Play sound when invoice is paid (#5113)

* Checkout v2: Play sound when invoice is paid

Closes #5085.

* Refactoring: Use low-level audio API to play the sound

Allows to play the sound regardless of browser permissions.

* Add audio file detection

* Use model state for file upload errors

* Add default sound and customizing option

* Fix mp3 detection

* Add sounds

* Update defaults

* Add nfcread and error sounds

* Improve label wording

* Replace sound

---------

Co-authored-by: nicolas.dorier <nicolas.dorier@gmail.com>

BTCPayServer/Controllers/UIInvoiceController.cs

@@ -5,6 +5,7 @@ using System.Linq;
 using System.Text;
 using System.Threading;
 using System.Threading.Tasks;
+using BTCPayServer.Abstractions.Contracts;
 using BTCPayServer.Abstractions.Extensions;
 using BTCPayServer.Client.Models;
 using BTCPayServer.Data;
@@ -55,6 +56,7 @@ namespace BTCPayServer.Controllers
         private readonly LinkGenerator _linkGenerator;
         private readonly IAuthorizationService _authorizationService;
         private readonly AppService _appService;
+        private readonly IFileService _fileService;
 
         public WebhookSender WebhookNotificationManager { get; }
 
@@ -79,6 +81,7 @@ namespace BTCPayServer.Controllers
             InvoiceActivator invoiceActivator,
             LinkGenerator linkGenerator,
             AppService appService,
+            IFileService fileService,
             IAuthorizationService authorizationService)
         {
             _displayFormatter = displayFormatter;
@@ -100,6 +103,7 @@ namespace BTCPayServer.Controllers
             _invoiceActivator = invoiceActivator;
             _linkGenerator = linkGenerator;
             _authorizationService = authorizationService;
+            _fileService = fileService;
             _appService = appService;
         }