Configure TreatWarningsAsErrors for Release builds only

Co-authored-by: Chris-Wolfgang <210299580+Chris-Wolfgang@users.noreply.github.com>

Author: Copilot

CONTRIBUTING.md

@@ -162,7 +162,7 @@ dotnet restore
 dotnet build --configuration Release
 ```
 
-**Note:** All builds treat analyzer warnings as errors (`<TreatWarningsAsErrors>true</TreatWarningsAsErrors>`).
+**Note:** Release builds treat all analyzer warnings as errors (`<TreatWarningsAsErrors>true</TreatWarningsAsErrors>`). Debug builds allow warnings to facilitate development.
 
 ### Run Tests
 

src/Wolfgang.Extensions.IAsyncEnumerable/Wolfgang.Extensions.IAsyncEnumerable.csproj

@@ -35,7 +35,6 @@
   <PropertyGroup>
     <AnalysisMode>AllEnabledByDefault</AnalysisMode>
     <EnforceCodeStyleInBuild>true</EnforceCodeStyleInBuild>
-    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
     <Nullable>enable</Nullable>
   </PropertyGroup>