feat: Add race upload functionality and file transfer endpoints

- Implemented IRaceUploadCommunicationClient with methods for saving races, creating race points, indexing race points, retrieving race details, and uploading files to the receiver.
- Added ReceiveFilePath option to CatalogCommunicationOptions for file transfer configuration.
- Enhanced CatalogCommunicationServiceCollectionExtensions to validate ReceiveFilePath.
- Developed RaceUploadCommunicationClient to handle race-related API interactions, including saving race data and uploading processed images.
- Updated API documentation to reflect new race upload and file transfer endpoints.
- Modified Avalonia UI to support race creation and processed image uploads, including new input fields and buttons.
- Introduced RaceSaveRequest and ReceiveFileUploadRequest models for structured data handling.

Catalog.Communication/Models/ReceiveFileUploadRequest.cs

@@ -0,0 +1,16 @@
+namespace Catalog.Communication.Models;
+
+public sealed class ReceiveFileUploadRequest
+{
+    public required string FileName { get; init; }
+
+    public required Stream FileStream { get; init; }
+
+    public required string DestinationPath { get; init; }
+
+    public bool OverwriteRemoteFile { get; init; }
+
+    public int? BufferSize { get; init; }
+
+    public string? ContentType { get; init; }
+}