build: add SourceLink support for debugging with PDBs

- Added Microsoft.SourceLink.GitHub package
- Enabled PublishRepositoryUrl, EmbedUntrackedSources, and ContinuousIntegrationBuild
- Configured portable PDB generation for better symbol support

Author: akrisanov

src/HttpClient.Resilience/HttpClient.Resilience.csproj

@@ -18,6 +18,10 @@
     <IncludeSymbols>true</IncludeSymbols>
     <SymbolPackageFormat>snupkg</SymbolPackageFormat>
     <GeneratePackageOnBuild>false</GeneratePackageOnBuild>
+    <PublishRepositoryUrl>true</PublishRepositoryUrl>
+    <EmbedUntrackedSources>true</EmbedUntrackedSources>
+    <ContinuousIntegrationBuild>true</ContinuousIntegrationBuild>
+    <DebugType>portable</DebugType>
   </PropertyGroup>
 
   <ItemGroup>
@@ -28,4 +32,8 @@
   <ItemGroup>
     <None Include="..\..\README.md" Pack="true" PackagePath="/" />
   </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="8.0.0" PrivateAssets="All" />
+  </ItemGroup>
 </Project>