chore: repo cleanup and code quality improvements

- Remove global.json (SDK pinning unnecessary)

- Remove nuget.config, move MyGet source to .csproj RestoreAdditionalProjectSources

- Gitignore ndepend/ entirely, move badges to docs/img/

- Update README.md and docs/ndepend.md badge paths

- Add NDepend project property to QuanTAlib.slnx

- Expand .editorconfig ReSharper/diagnostic suppressions

- Use ArgumentOutOfRangeException instead of ArgumentException

- Use discard _ for unused event sender parameters

- Remove quantalib.code-workspace and sonar-suppressions.json

- Add filter signature SVGs

lib/filters/ssf3/Ssf3.cs

@@ -33,7 +33,7 @@ public sealed class Ssf3 : AbstractBase
         CalculateCoefficients();
         Name = $"Ssf3({_period})";
         WarmupPeriod = 6 * period;
-        _handler = new TValuePublishedHandler(Handle);
+        _handler = Handle;
         Init();
     }