fix: remove symbols package, JetBrains.Annotations dep, target net10.0 only

- Disabled symbol package generation (IncludeSymbols=false)
- Removed JetBrains.Annotations dependency from Directory.Build.props
- Changed QuanTAlib package to target net10.0 only (net8.0 remains for Quantower wrappers)

Directory.Build.props

@@ -16,8 +16,7 @@
     <DebugType>full</DebugType>
     <PublishRepositoryUrl>true</PublishRepositoryUrl>
     <EmbedUntrackedSources>true</EmbedUntrackedSources>
-    <IncludeSymbols>true</IncludeSymbols>
-    <SymbolPackageFormat>snupkg</SymbolPackageFormat>
+    <IncludeSymbols>false</IncludeSymbols>
     <IsLocalBuild Condition="'$(GITHUB_ACTIONS)' == ''">true</IsLocalBuild>
 
     <!-- AOT and Trim compatibility analyzers (build-time validation) -->
@@ -94,7 +93,6 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="JetBrains.Annotations" Version="2025.2.4" />
     <PackageReference Include="Roslynator.Analyzers" Version="4.12.9">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>

lib/quantalib.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net8.0;net10.0</TargetFrameworks>
+    <TargetFramework>net10.0</TargetFramework>
     <Title>QuanTAlib</Title>
     <Product>Library of TA Calculations, Charts and Strategies for Quantower</Product>
     <Description>Quantitative Technical Analysis Library in C# for Quantower</Description>