feat(dynamics): add PlusDI, MinusDI, PlusDM, MinusDM indicators

Complete thin Dx-composition wrapper indicators with full test coverage:

- PlusDi/MinusDi: Directional Indicator wrappers (DiPlus/DiMinus from Dx)
- PlusDm/MinusDm: Directional Movement wrappers (DmPlus/DmMinus from Dx)
- Individual validation tests per indicator directory (TALib, Skender, bounds)
- Combined unit tests (DiDm.Tests.cs) and validation tests (DiDm.Validation.Tests.cs)
- Quantower wrappers + tests for all 4 indicators
- PineScript v6 implementations with compensated RMA
- Normalized .md documentation for all indicators and categories
- 182 tests passing, 0 failures

lib/dynamics/plusdm/PlusDm.Quantower.cs

@@ -0,0 +1,51 @@
+using System.Drawing;
+using System.Runtime.CompilerServices;
+using TradingPlatform.BusinessLayer;
+
+namespace QuanTAlib;
+
+[SkipLocalsInit]
+public sealed class PlusDmIndicator : Indicator, IWatchlistIndicator
+{
+    [InputParameter("Period", sortIndex: 1, 1, 1000, 1, 0)]
+    public int Period { get; set; } = 14;
+
+    [InputParameter("Show cold values", sortIndex: 21)]
+    public bool ShowColdValues { get; set; } = true;
+
+    private PlusDm _plusDm = null!;
+    private readonly LineSeries _plusDmSeries;
+
+    public static int MinHistoryDepths => 0;
+    int IWatchlistIndicator.MinHistoryDepths => MinHistoryDepths;
+
+    public override string ShortName => $"+DM {Period}";
+    public override string SourceCodeLink => "https://github.com/mihakralj/QuanTAlib/blob/main/lib/dynamics/plusdm/PlusDm.Quantower.cs";
+
+    public PlusDmIndicator()
+    {
+        OnBackGround = true;
+        SeparateWindow = true;
+        Name = "+DM - Plus Directional Movement";
+        Description = "Wilder-smoothed upward directional movement in price units";
+
+        _plusDmSeries = new LineSeries(name: "+DM", color: Color.Green, width: 2, style: LineStyle.Solid);
+
+        AddLineSeries(_plusDmSeries);
+    }
+
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    protected override void OnInit()
+    {
+        _plusDm = new PlusDm(Period);
+        base.OnInit();
+    }
+
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    protected override void OnUpdate(UpdateArgs args)
+    {
+        TValue result = _plusDm.Update(this.GetInputBar(args), args.IsNewBar());
+
+        _plusDmSeries.SetValue(result.Value, _plusDm.IsHot, ShowColdValues);
+    }
+}