Add default project launch profile

Ensure generated launchSettings.json includes Visual Studio's default project-named profile alongside SmallSharp file profiles.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: kzu

src/SmallSharp/SmallSharp.targets

@@ -194,6 +194,9 @@
     <SortItems Items="@(StartupFile)">
       <Output TaskParameter="SortedItems" ItemName="SortedStartupFile" />
     </SortItems>
+    <JsonPoke ContentPath="$(MSBuildProjectDirectory)\Properties\launchSettings.json"
+              Query="$.profiles['$(MSBuildProjectName)'].commandName"
+              Value="$(MSBuildProjectName)" />
     <JsonPoke ContentPath="$(MSBuildProjectDirectory)\Properties\launchSettings.json"
               Query="$.profiles['%(SortedStartupFile.Filename)%(SortedStartupFile.Extension)'].commandName"
               Value="Project" />