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.

lib/core/AbstractBase.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Runtime.CompilerServices;
 
 namespace QuanTAlib;
 
@@ -36,6 +37,7 @@ public abstract class AbstractBase : ITValuePublisher
     /// <summary>
     /// Helper to invoke the Pub event.
     /// </summary>
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
     protected void PubEvent(TValue value, bool isNew = true)
     {
         Pub?.Invoke(this, new TValueEventArgs { Value = value, IsNew = isNew });