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- Removed outdated `.vscode/launch.json` configurations.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/numerics/exptrans/Exptrans.cs

@@ -30,6 +30,9 @@ public sealed class Exptrans : AbstractBase
         WarmupPeriod = 0;
     }
 
+    /// <summary>
+    /// Creates Exptrans with source for event-based chaining.
+    /// </summary>
     /// <param name="source">Source indicator for chaining</param>
     public Exptrans(ITValuePublisher source) : this()
     {
@@ -146,4 +149,4 @@ public sealed class Exptrans : AbstractBase
         _p_state = new(1.0);
         Last = default;
     }
-}
+}