Refactor and optimize TBar, TBarSeries, and TSeries notebooks; remove obsolete code

- Enhanced Alma class by simplifying the CalculateWeightedSum method and removing unnecessary comments.
- Removed SIMD-related methods from Conv class, replacing them with optimized DotProduct calls.
- Updated Sma and Wma classes to use source.ContainsNonFinite() for non-finite value checks, improving readability and performance.

lib/trends/sma/Sma.cs

@@ -225,7 +225,7 @@ public sealed class Sma : ITValuePublisher
         // Try SIMD path for large, clean datasets
         // Requirements: AVX2 support, large enough dataset, no NaN values
         const int SimdThreshold = 256;
-        if (Avx2.IsSupported && len >= SimdThreshold && !HasNonFiniteValues(source))
+        if (Avx2.IsSupported && len >= SimdThreshold && !source.ContainsNonFinite())
         {
             CalculateSimdCore(source, output, period);
             return;
@@ -367,20 +367,6 @@ public sealed class Sma : ITValuePublisher
         }
     }
 
-    /// <summary>
-    /// Checks if span contains any non-finite values (NaN or Infinity).
-    /// </summary>
-    [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    private static bool HasNonFiniteValues(ReadOnlySpan<double> span)
-    {
-        for (int idx = 0; idx < span.Length; idx++)
-        {
-            if (!double.IsFinite(span[idx]))
-                return true;
-        }
-        return false;
-    }
-
     /// <summary>
     /// Resets the SMA state.
     /// </summary>