feat: Add new CodeQL extension for C# and SonarLint configuration

- Introduced a new CodeQL extension for C# in `.github/codeql/extensions/quantalib-csharp/codeql-pack.yml`.
- Added SonarLint configuration in `.sonarlint/CSharp/SonarLint.xml` and `.sonarlint/csharp.ruleset` to suppress specific rules for high-performance indicators.
- Removed outdated `.vscode/launch.json` configurations.
- Updated `.vscode/tasks.json` to streamline build and test tasks, including renaming and consolidating tasks.
- Modified `Directory.Build.props` to enhance SARIF output directory handling and integrate SonarLint rules.
- Refactored various indicator classes to improve code clarity and maintainability, including updates to method parameters for consistency.
- Added XML documentation comments to several classes and methods for better code understanding.
- Improved numerical stability in calculations by replacing direct comparisons with `double.Epsilon` checks in multiple classes.

lib/trends_IIR/zlema/Zlema.Validation.Tests.cs

@@ -7,7 +7,7 @@ public class ZlemaValidationTests
     [Fact]
     public void Zlema_Streaming_MatchesReference()
     {
-        int period = 20;
+        const int period = 20;
         TSeries series = BuildSeries(300, seed: 5);
         double[] reference = new double[series.Count];
 
@@ -24,7 +24,7 @@ public class ZlemaValidationTests
     [Fact]
     public void Zlema_Batch_MatchesReference()
     {
-        int period = 14;
+        const int period = 14;
         TSeries series = BuildSeries(250, seed: 9);
         double[] reference = new double[series.Count];
 
@@ -40,7 +40,7 @@ public class ZlemaValidationTests
     [Fact]
     public void Zlema_Span_MatchesReference()
     {
-        int period = 30;
+        const int period = 30;
         TSeries series = BuildSeries(200, seed: 12);
         double[] values = series.Values.ToArray();
         var output = new double[values.Length];