Add TBar, TBarSeries, TSeries, TValue, and IFeed implementations with comprehensive documentation and examples

- Introduced TBar struct for efficient OHLCV data representation.
- Implemented TBarSeries class for high-performance collection of TBar instances using Structure of Arrays (SoA) layout.
- Added TSeries class for time-series data management with zero-copy access.
- Created TValue struct for time-value pairs with implicit conversions.
- Defined IFeed interface for consistent data feed implementations.
- Developed CsvFeed class for loading historical OHLCV data from CSV files.
- Implemented GBM class for generating synthetic financial data using Geometric Brownian Motion.
- Added Quantower project files for Averages indicator with necessary dependencies and configurations.
- Included extensive usage examples and notebooks for TBar, TBarSeries, TSeries, TValue, and feed implementations.

lib/QuanTAlib.Tests.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net10.0</TargetFramework>
+    <TargetFrameworks></TargetFrameworks>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <IsPackable>false</IsPackable>
+    <IsTestProject>true</IsTestProject>
+    <EnableMicrosoftTestingPlatform>false</EnableMicrosoftTestingPlatform>
+    <TestingPlatformDotnetTestSupport>false</TestingPlatformDotnetTestSupport>
+    <NoWarn>$(NoWarn);CS8892</NoWarn>
+    <EnableDefaultCompileItems>false</EnableDefaultCompileItems>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="coverlet.collector" Version="6.0.4" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.14.1" />
+    <PackageReference Include="Skender.Stock.Indicators" Version="2.7.0" />
+    <PackageReference Include="TALib.NETCore" Version="0.5.0" />
+    <PackageReference Include="Tulip.NETCore" Version="0.8.0.1" />
+    <PackageReference Include="xunit" Version="2.9.3" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="3.1.4" />
+    <PackageReference Include="Microsoft.Testing.Platform.MSBuild" Version="1.6.1" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Using Include="Xunit" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="quantalib.csproj" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Compile Include="**\*.Tests.cs" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <None Include="feeds\csv\daily_IBM.csv">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+      <Link>daily_IBM.csv</Link>
+    </None>
+  </ItemGroup>
+
+</Project>