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- Removed outdated `.vscode/launch.json` configurations.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_FIR/hamma/Hamma.cs

@@ -75,6 +75,9 @@ public sealed class Hamma : AbstractBase
         _state.LastValidValue = double.NaN;
     }
 
+    /// <summary>
+    /// Creates HAMMA with source for event-based chaining.
+    /// </summary>
     /// <param name="source">Data source for event-based updates</param>
     /// <param name="period">Lookback period for the Hamming window (default: 10)</param>
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
@@ -391,4 +394,4 @@ public sealed class Hamma : AbstractBase
         _p_state = _state;
         Last = default;
     }
-}
+}

lib/trends_FIR/hanma/Hanma.cs

@@ -70,6 +70,9 @@ public sealed class Hanma : AbstractBase
         _state = new State(double.NaN, IsInitialized: false);
     }
 
+    /// <summary>
+    /// 
+    /// </summary>
     /// <param name="source">Data source for event-based updates</param>
     /// <param name="period">Lookback period for the Hanning window (default: 10)</param>
     [MethodImpl(MethodImplOptions.AggressiveInlining)]

lib/trends_FIR/hwma/Hwma.cs

@@ -109,6 +109,9 @@ public sealed class Hwma : AbstractBase
         _state = new State(double.NaN, 0, 0, double.NaN, IsInitialized: false);
     }
 
+    /// <summary>
+    /// Creates HWMA with source for event-based chaining.
+    /// </summary>
     /// <param name="source">Data source for event-based updates</param>
     /// <param name="period">Period for smoothing factor calculation (default: 10)</param>
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
@@ -339,4 +342,4 @@ public sealed class Hwma : AbstractBase
         _p_state = _state;
         Last = default;
     }
-}
+}

lib/trends_FIR/sgma/Sgma.cs

@@ -101,7 +101,7 @@ public sealed class Sgma : AbstractBase
                 weights[3] = 0.3429;
                 weights[4] = -0.0857;
                 double sum5 = weights[0] + weights[1] + weights[2] + weights[3] + weights[4];
-                invWeightSum = sum5 != 0.0 ? 1.0 / sum5 : 0.0;
+                invWeightSum = Math.Abs(sum5) > double.Epsilon ? 1.0 / sum5 : 0.0;
                 return;
             }
 
@@ -116,7 +116,7 @@ public sealed class Sgma : AbstractBase
                 weights[6] = -0.0476;
                 double sum7 = 0.0;
                 for (int i = 0; i < 7; i++) sum7 += weights[i];
-                invWeightSum = sum7 != 0.0 ? 1.0 / sum7 : 0.0;
+                invWeightSum = Math.Abs(sum7) > double.Epsilon ? 1.0 / sum7 : 0.0;
                 return;
             }
 
@@ -133,7 +133,7 @@ public sealed class Sgma : AbstractBase
                 weights[8] = -0.0281;
                 double sum9 = 0.0;
                 for (int i = 0; i < 9; i++) sum9 += weights[i];
-                invWeightSum = sum9 != 0.0 ? 1.0 / sum9 : 0.0;
+                invWeightSum = Math.Abs(sum9) > double.Epsilon ? 1.0 / sum9 : 0.0;
                 return;
             }
         }
@@ -376,7 +376,7 @@ public sealed class Sgma : AbstractBase
                     continue;
                 }
 
-                if (invWeightSum == 0.0)
+                if (Math.Abs(invWeightSum) < double.Epsilon)
                 {
                     output[i] = val;
                     continue;
@@ -399,7 +399,7 @@ public sealed class Sgma : AbstractBase
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
     private static double CalculateWeightedSumFull(RingBuffer buffer, double[] weights, double invWeightSum, double fallbackValue)
     {
-        if (invWeightSum == 0.0)
+        if (Math.Abs(invWeightSum) < double.Epsilon)
             return fallbackValue;
 
         ReadOnlySpan<double> internalBuf = buffer.InternalBuffer;
@@ -435,7 +435,7 @@ public sealed class Sgma : AbstractBase
                     Math.FusedMultiplyAdd(window[3], w3, window[4] * w4))));
 
                 double weightSum = w0 + w1 + w2 + w3 + w4;
-                return weightSum != 0.0 ? sum / weightSum : fallbackValue;
+                return Math.Abs(weightSum) > double.Epsilon ? sum / weightSum : fallbackValue;
             }
 
             if (p == 7)
@@ -458,7 +458,7 @@ public sealed class Sgma : AbstractBase
                 sum = Math.FusedMultiplyAdd(window[6], w6, sum);
 
                 double weightSum = w0 + w1 + w2 + w3 + w4 + w5 + w6;
-                return weightSum != 0.0 ? sum / weightSum : fallbackValue;
+                return Math.Abs(weightSum) > double.Epsilon ? sum / weightSum : fallbackValue;
             }
 
             if (p == 9)
@@ -485,7 +485,7 @@ public sealed class Sgma : AbstractBase
                 sum = Math.FusedMultiplyAdd(window[8], w8, sum);
 
                 double weightSum = w0 + w1 + w2 + w3 + w4 + w5 + w6 + w7 + w8;
-                return weightSum != 0.0 ? sum / weightSum : fallbackValue;
+                return Math.Abs(weightSum) > double.Epsilon ? sum / weightSum : fallbackValue;
             }
         }
 
@@ -522,4 +522,4 @@ public sealed class Sgma : AbstractBase
         _p_lastValidValue = double.NaN;
         Last = default;
     }
-}
+}

lib/trends_FIR/sma/Sma.cs

@@ -189,7 +189,6 @@ public sealed class Sma : AbstractBase
 
             double val = GetValidValue(input.Value);
             UpdateState(val);
-
         }
         else
         {