Add Savitzky-Golay Moving Average (SGMA) Indicator Implementation

- Implemented SgmaIndicator class in C# with properties for Period, Degree, and Source.
- Added unit tests for SgmaIndicator covering constructor defaults, initialization, and various update scenarios.
- Created a new Quantower adapter for the SGMA indicator, including input parameters and line series setup.
- Removed legacy SGMA implementation and tests to streamline the codebase.
- Updated project files to include new indicator and tests in the build process.
- Generated a missing indicators report and outlined a plan for oscillator documentation rewrite.

lib/oscillators/ultosc/Ultosc.Quantower.cs

@@ -0,0 +1,56 @@
+using System.Drawing;
+using System.Runtime.CompilerServices;
+using TradingPlatform.BusinessLayer;
+
+namespace QuanTAlib;
+
+[SkipLocalsInit]
+public sealed class UltoscIndicator : Indicator, IWatchlistIndicator
+{
+    [InputParameter("Period 1 (Short)", sortIndex: 1, 1, 500, 1, 0)]
+    public int Period1 { get; set; } = 7;
+
+    [InputParameter("Period 2 (Medium)", sortIndex: 2, 1, 500, 1, 0)]
+    public int Period2 { get; set; } = 14;
+
+    [InputParameter("Period 3 (Long)", sortIndex: 3, 1, 500, 1, 0)]
+    public int Period3 { get; set; } = 28;
+
+    [InputParameter("Show cold values", sortIndex: 21)]
+    public bool ShowColdValues { get; set; } = true;
+
+    private Ultosc _ultosc = null!;
+    private readonly LineSeries _series;
+
+    public static int MinHistoryDepths => 0;
+    int IWatchlistIndicator.MinHistoryDepths => MinHistoryDepths;
+
+    public override string ShortName => $"ULTOSC {Period1},{Period2},{Period3}";
+    public override string SourceCodeLink => "https://github.com/mihakralj/QuanTAlib/blob/main/lib/oscillators/ultosc/Ultosc.cs";
+
+    public UltoscIndicator()
+    {
+        OnBackGround = true;
+        SeparateWindow = true;
+        Name = "ULTOSC - Ultimate Oscillator";
+        Description = "Ultimate Oscillator by Larry Williams using weighted averages of three time periods";
+
+        _series = new LineSeries(name: "ULTOSC", color: Color.Blue, width: 2, style: LineStyle.Solid);
+        AddLineSeries(_series);
+    }
+
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    protected override void OnInit()
+    {
+        _ultosc = new Ultosc(Period1, Period2, Period3);
+        base.OnInit();
+    }
+
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    protected override void OnUpdate(UpdateArgs args)
+    {
+        _ = _ultosc.Update(this.GetInputBar(args), args.IsNewBar());
+
+        _series.SetValue(_ultosc.Last.Value, _ultosc.IsHot, ShowColdValues);
+    }
+}