Add AFIRMA indicator implementation with validation tests and documentation

- Implemented AFIRMA (Autoregressive Finite Impulse Response Moving Average) class with support for various window types and batch processing.
- Created unit tests for AFIRMA to validate internal consistency, streaming, and batch processing.
- Added comprehensive documentation for AFIRMA, including usage examples, performance profile, and parameter selection guide.
- Removed obsolete omnisharp.json configuration file.

docs/_sidebar.md

@@ -11,6 +11,7 @@
 - **Trends**
   - [Overview](../lib/trends/_index.md)
   - [Trend Comparison](trendcomparison.md)
+  - [AFIRMA - Autoregressive FIR MA](../lib/trends/afirma/Afirma.md)
   - [ALMA - Arnaud Legoux MA](../lib/trends/alma/Alma.md)
   - [BESSEL - Bessel Filter](../lib/trends/bessel/Bessel.md)
   - [BILATERAL - Bilateral Filter](../lib/trends/bilateral/Bilateral.md)

docs/indicators.md

@@ -65,6 +65,7 @@ These measure the spread of data points around the mean.
 
 ### Trends
 
+- [**AFIRMA**](../lib/trends/afirma/Afirma.md) - Autoregressive FIR MA
 - [**ALMA**](../lib/trends/alma/Alma.md) - Arnaud Legoux MA
 - [**BESSEL**](../lib/trends/bessel/Bessel.md) - Bessel Filter
 - [**BILATERAL**](../lib/trends/bilateral/Bilateral.md) - Bilateral Filter

docs/validation.md

@@ -16,7 +16,7 @@
 | **Aroon** | [Aroon](../lib/momentum/aroon/aroon.md) | ✔️ | ✔️ | ✔️ | - |
 | **Aroon Oscillator** | [AroonOsc](../lib/momentum/aroonosc/AroonOsc.md) | ✔️ | ✔️ | ✔️ | - |
 | **ATR Bands** | Atrbands | - | - | - | ❔ |
-| **Autoregressive FIR MA** | Afirma | - | - | - | - |
+| **Autoregressive FIR MA** | [Afirma](../lib/trends/afirma/Afirma.md) | - | - | - | - |
 | **Average Daily Range** | Adr | - | - | - | - |
 | **Average Directional Index** | [Adx](../lib/momentum/adx/adx.md) | ✔️ | ✔️ | ✔️ | ✔️ |
 | **Average Directional Movement Rating** | [Adxr](../lib/momentum/adxr/Adxr.md) | ✔️ | ✔️ | - | - |