Refactor project files for improved readability and structure

- Cleaned up whitespace in Directory.Build.props and Directory.Packages.props for consistency.
- Reformatted project file references in PnvPanel.Api.csproj for better clarity.
- Enhanced code readability in various endpoint files by adjusting line breaks and indentation.
- Standardized method signatures and improved formatting in ResultExtensions and multiple endpoint classes for better maintainability.

backend/src/PnvPanel.Application/Support/TicketCommentDto.cs

@@ -1,5 +1,10 @@
 namespace PnvPanel.Application.Support;
 
 public sealed record TicketCommentDto(
-    Guid Id, Guid AuthorId, string AuthorName, string Body, DateTimeOffset CreatedAt,
-    IReadOnlyList<TicketAttachmentDto> Attachments);
+    Guid Id,
+    Guid AuthorId,
+    string AuthorName,
+    string Body,
+    DateTimeOffset CreatedAt,
+    IReadOnlyList<TicketAttachmentDto> Attachments
+);