Refactor tests and implementations for various indicators

- Updated RsiIndicatorTests to ensure proper initialization and state checks.
- Added new tests for Rsx, Vel, and Adosc indicators to validate behavior under iterative corrections and edge cases (NaN, Infinity).
- Enhanced Bessel indicator tests and implementation with consistent formatting.
- Improved Ema and Pwma implementations by ensuring proper handling of values.
- Introduced mock classes for charting to facilitate testing without dependencies.
- Ensured all indicators produce consistent results across different modes of operation.
- Cleaned up code formatting and added missing commas for better readability.

quantower/Mocks/ChartMocks.cs

@@ -0,0 +1,14 @@
+// Mock types for TradingPlatform.BusinessLayer.Chart to enable testing
+// These are minimal implementations for unit testing purposes only
+
+namespace TradingPlatform.BusinessLayer.Chart;
+
+/// <summary>
+/// Coordinates converter interface
+/// </summary>
+public interface IChartWindowCoordinatesConverter
+{
+    DateTime GetTime(int x);
+    double GetChartX(DateTime time);
+    double GetChartY(double value);
+}