Add Stochastic Oscillator implementation and validation tests

- Implemented Stochastic Oscillator (%K and %D) in Stoch.cs with streaming and batch processing capabilities.
- Added validation tests for the Stochastic Oscillator in Stoch.Validation.Tests.cs, ensuring consistency with Skender.Stock.Indicators.
- Created documentation for the Stochastic Oscillator in Stoch.md, detailing its mathematical formula, architecture, parameters, and common pitfalls.
- Updated project file to include necessary numeric libraries for highest and lowest calculations.

lib/oscillators/bbb/bbb.pine

@@ -3,13 +3,6 @@
 //@version=6
 indicator("Bollinger %B", "BBB", overlay=false)
 
-//@function Calculates Bollinger Bands components for %B calculation
-//@doc https://github.com/mihakralj/pinescript/blob/main/indicators/oscillators/bbb.md
-//@param source Series to calculate from
-//@param period Lookback period for SMA and standard deviation
-//@param multiplier Standard deviation multiplier for band width
-//@returns Bollinger %B value (typically 0-1 range; can overshoot)
-//@optimized Uses circular buffer with running sums, O(1) complexity per bar
 bbb(series float source, simple int period, simple float multiplier) =>
     if period <= 0 or multiplier <= 0.0
         runtime.error("Period and multiplier must be greater than 0")
@@ -66,8 +59,6 @@ bbb(series float source, simple int period, simple float multiplier) =>
 
     result
 
-// ---------- Main loop ----------
-
 // Inputs
 i_period = input.int(20, "Period", minval=1)
 i_source = input.source(close, "Source")