Apply dotnet format with new editorconfig rules

Automated formatting: BOM removal, using sort order, final newlines,
whitespace normalization across all projects.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Svrnty.Sample/SimpleAsyncQueryableService.cs

@@ -1,5 +1,5 @@
-using PoweredSoft.Data.Core;
 using System.Linq.Expressions;
+using PoweredSoft.Data.Core;
 
 namespace Svrnty.Sample;