Refactor and expand unit tests for TBarSeries, TSeries, and TValue classes

- Enhanced TBarSeriesTests with additional constructors, methods, and assertions for better coverage.
- Improved TSeriesTests to include new constructors, methods, and edge cases.
- Expanded TValueTests to cover constructors, implicit conversions, equality checks, and hash codes.
- Updated project file to target .NET 10.0 and include internal visibility for tests.
- Added Codacy configuration for code quality checks.

lib/quantalib.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net8.0;net9.0;net10.0</TargetFrameworks>
+    <TargetFrameworks>net10.0</TargetFrameworks>
     <Title>QuanTAlib</Title>
     <Product>Library of TA Calculations, Charts and Strategies for Quantower</Product>
     <Description>Quantitative Technical Analysis Library in C# for Quantower</Description>
@@ -32,6 +32,10 @@
     <UserSecretsId>6afc11a7-4355-4f5e-9fdf-22431e5b03cb</UserSecretsId>
   </PropertyGroup>
 
+  <ItemGroup>
+    <InternalsVisibleTo Include="QuanTAlib.Tests" />
+  </ItemGroup>
+
   <ItemGroup>
     <Compile Include="**\*.cs" Exclude="**\*.Tests.cs;**\*.Quantower.cs;obj\**\*.cs" />
   </ItemGroup>