v1.3.0 Restructure Saxonite workspace and upgrade to .NET 10 (#1)

Move Saxonite’s projects into a dedicated `Workspace` folder and align the solution with .NET 10 and the current Common workspace. Update encryption integration, test project structure and coverage, and repository guidance and upgrade notes.

- Relocate application and library projects while retaining Git rename history.
- Split tests into Admin, Online, and Shared projects; add representative behavioral and serialization tests.
- Update Common integration, application version, and repository documentation.

Application version: 1.3.0

Reviewed-on: #1
Co-authored-by: andy <andy@sarand.com>

Workspace/SaxoniteStandardDbas/Dbas/App/SaxSystem_Dbas.cs

@@ -0,0 +1,54 @@
+using Saxonite.Net.Standard.Base.App;
+using Saxonite.Net.Standard.Base.Mgr;
+using Saxonite.Net.Standard.Base.Mgr.Reference;
+using Saxonite.Net.Standard.Base.Mgr.Support;
+using Saxonite.Net.Standard.Dbas.Mgr;
+using Saxonite.Net.Standard.Dbas.Mgr.Reference;
+using Saxonite.Net.Standard.Dbas.Mgr.Support;
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Saxonite.Net.Standard.Dbas.App
+{
+	//=======================================================================
+	public class SaxSystem_Dbas : SaxSystem
+	{
+		//-------------------------------------------------------------------
+		// Protected construction.
+		protected SaxSystem_Dbas()
+		{
+		}
+
+		//-------------------------------------------------------------------
+		// Business components.
+		//-------------------------------------------------------------------
+		public override SaxReferenceMgr CreateReferenceMgr(SaxSessionContext sessionContext, SaxInternals internals)
+		{
+			return new SaxReferenceMgr_Dbas(sessionContext, internals);
+		}
+		public override SaxAccountMgr CreateAccountMgr(SaxSessionContext sessionContext, SaxInternals internals)
+		{
+			return new SaxAccountMgr_Dbas(sessionContext, internals);
+		}
+		public override SaxActivityMgr CreateActivityMgr(SaxSessionContext sessionContext, SaxInternals internals)
+		{
+			return new SaxActivityMgr_Dbas(sessionContext, internals);
+		}
+		public override SaxItemDataMgr CreateItemDataMgr(SaxSessionContext sessionContext, SaxInternals internals)
+		{
+			return new SaxItemDataMgr_Dbas(sessionContext, internals);
+		}
+		public override SaxReferenceGolfMgr CreateReferenceGolfMgr(SaxSessionContext sessionContext, SaxInternals internals)
+		{
+			return new SaxReferenceGolfMgr_Dbas(sessionContext, internals);
+		}
+		public override SaxSupportMgr CreateSupportMgr(SaxSessionContext sessionContext, SaxInternals internals)
+		{
+			return new SaxSupportMgr_Dbas(sessionContext, internals);
+		}
+
+		//-------------------------------------------------------------------
+	}
+	//=======================================================================
+}