feat: add new indicators (Decay, Edecay, MinusDi, MinusDm, PlusDi, PlusDm, Maxindex, Minindex, Sarext) and update pine scripts, core libs, validation tests, and python bindings

lib/dynamics/vhf/Vhf.cs

@@ -412,22 +412,7 @@ public sealed class Vhf : AbstractBase
                 // Calculate VHF
                 if (closeFilled >= closeBufSize && diffFilled >= period)
                 {
-                    // Scan for max/min over close buffer
-                    double hi = double.MinValue;
-                    double lo = double.MaxValue;
-                    for (int k = 0; k < closeBufSize; k++)
-                    {
-                        double cv = closeBuf[k];
-                        if (cv > hi)
-                        {
-                            hi = cv;
-                        }
-                        if (cv < lo)
-                        {
-                            lo = cv;
-                        }
-                    }
-
+                    var (lo, hi) = ((ReadOnlySpan<double>)closeBuf).MinMaxSIMD();
                     double numerator = hi - lo;
 
                     if (diffSum > 1e-10)

lib/dynamics/vhf/vhf.pine

@@ -1,4 +1,4 @@
-// The MIT License (MIT)
+// Licensed under the Apache License, Version 2.0
 // © mihakralj
 //@version=6
 indicator("VHF: Vertical Horizontal Filter", "VHF", overlay=false)