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/SaxoniteUnitTestsShared/UnitTests/Data/Bus/SaxUserAccount_DisplayName_Tester.cs

@@ -0,0 +1,21 @@
+using NUnit.Framework;
+using Saxonite.Net.Standard.Base.Bus;
+
+namespace Saxonite.Net.Core.UnitTests.Data.Bus
+{
+	//=======================================================================
+	[TestFixture]
+	public class SaxUserAccount_DisplayName_Tester
+	{
+		//-------------------------------------------------------------------
+		[TestCase("Dr", "Ada", "Lovelace", "Dr Ada Lovelace")]
+		[TestCase(null, "Ada", "Lovelace", "Ada Lovelace")]
+		[TestCase("Dr", null, "Lovelace", "Dr Lovelace")]
+		[TestCase(null, null, null, "")]
+		public void DisplayNameJoinsPresentNameParts(string title, string firstName, string lastName, string expected)
+		{
+			Assert.That(SaxUserAccount.GetDisplayName(title, firstName, lastName), Is.EqualTo(expected));
+		}
+	}
+	//=======================================================================
+}