SIMD Refactor: Merge simd-dev into dev (#55)

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
Co-authored-by: aider (openrouter/anthropic/claude-sonnet-4) <aider@aider.chat>
Co-authored-by: Warp <agent@warp.dev>

lib/numerics/sigmoid/sigmoid.pine

@@ -0,0 +1,28 @@
+// The MIT License (MIT)
+// © mihakralj
+//@version=6
+indicator("Logistic Function (SIGMOID)", "SIGMOID", overlay=false, precision=6)
+
+//@function Applies the logistic (sigmoid) function to a source series.
+// Formula: S(x) = 1 / (1 + exp(-k * (x - x0)))
+// Maps any real-valued input to the range (0, 1).
+//@doc https://github.com/mihakralj/pinescript/blob/main/indicators/numerics/sigmoid.md
+//@param src The source series.
+//@param k The steepness factor of the sigmoid curve. Higher k means a steeper curve.
+//@param x0 The x-value of the sigmoid's midpoint (where the output is 0.5).
+//@returns The sigmoid transformed series, values between 0 and 1.
+sigmoid(series float src, simple float k, float x0) =>
+    1 / (1 + math.exp(-k * (src - x0)))
+
+// ---------- Main loop ----------
+
+// Inputs
+i_source = input.source(close, "Source")
+i_steepness_k = input.float(0.5, "Steepness (k)", minval = 0.000001, step = 0.1)
+
+// Calculation
+sigmoidValue = sigmoid(i_source, i_steepness_k, ta.sma(i_source,200))
+
+// Plot
+plot(sigmoidValue, "Sigmoid", color=color.yellow, linewidth=2)
+