Added a top-level Makefile in dotnet-sdk to simplify running tests and linters

Makefile

@@ -0,0 +1,66 @@
+.PHONY: help test test-net48 test-net8 test-net9 lint fmt check
+
+# Default target when running just 'make'
+help:
+	@echo "Available targets:"
+	@echo "  test       - Run all tests"
+	@echo "  test-net48 - Run tests for .NET Framework 4.8"
+	@echo "  test-net8  - Run tests for .NET 8.0"
+	@echo "  test-net9  - Run tests for .NET 9.0"
+	@echo "  lint       - Verify code formatting and style"
+	@echo "  fmt        - Apply code formatting"
+	@echo "  check      - Run all checks (lint + test)"
+
+# Run tests for all supported frameworks
+test: test-net48 test-net8 test-net9
+	@echo "✅ All tests completed successfully!"
+
+# Run tests for .NET Framework 4.8
+test-net48:
+	@echo "🚀 Running tests for .NET Framework 4.8..."
+	@dotnet test --framework net48 --no-restore
+
+# Run tests for .NET 8.0
+test-net8:
+	@echo "🚀 Running tests for .NET 8.0..."
+	@dotnet test --framework net8.0 --no-restore
+
+# Run tests for .NET 9.0
+test-net9:
+	@echo "🚀 Running tests for .NET 9.0..."
+	@dotnet test --framework net9.0 --no-restore
+
+# Verify code formatting and analyzers
+lint:
+	@echo "🔍 Checking code formatting..."
+	@dotnet format --verify-no-changes --severity info || (echo "❌ Code formatting issues found. Run 'make fmt' to fix." && exit 1)
+	@echo "✅ Code formatting looks good!"
+
+# Apply formatting fixes
+fmt:
+	@echo "🎨 Applying code formatting..."
+	@# Create backups of project files
+	@cp src/OpenFga.Sdk/OpenFga.Sdk.csproj src/OpenFga.Sdk/OpenFga.Sdk.csproj.bak
+	@cp src/OpenFga.Sdk.Test/OpenFga.Sdk.Test.csproj src/OpenFga.Sdk.Test/OpenFga.Sdk.Test.csproj.bak
+
+	@# Use sed with appropriate flags for platform compatibility
+	@if [ "$$(uname)" = "Darwin" ]; then \
+		sed -i '' "s/<TargetFrameworks>.*<\\/TargetFrameworks>/<TargetFramework>net8.0<\\/TargetFramework>/" src/OpenFga.Sdk/OpenFga.Sdk.csproj && \
+		sed -i '' "s/<TargetFrameworks>.*<\\/TargetFrameworks>/<TargetFramework>net8.0<\\/TargetFramework>/" src/OpenFga.Sdk.Test/OpenFga.Sdk.Test.csproj; \
+	else \
+		sed -i "s/<TargetFrameworks>.*<\\/TargetFrameworks>/<TargetFramework>net8.0<\\/TargetFramework>/" src/OpenFga.Sdk/OpenFga.Sdk.csproj && \
+		sed -i "s/<TargetFrameworks>.*<\\/TargetFrameworks>/<TargetFramework>net8.0<\\/TargetFramework>/" src/OpenFga.Sdk.Test/OpenFga.Sdk.Test.csproj; \
+	fi
+
+	@# Run formatting
+	@dotnet restore ./OpenFga.Sdk.sln
+	@dotnet format ./OpenFga.Sdk.sln || true
+
+	@# Restore original project files
+	@mv src/OpenFga.Sdk/OpenFga.Sdk.csproj.bak src/OpenFga.Sdk/OpenFga.Sdk.csproj
+	@mv src/OpenFga.Sdk.Test/OpenFga.Sdk.Test.csproj.bak src/OpenFga.Sdk.Test/OpenFga.Sdk.Test.csproj
+	@echo "✅ Code formatting applied successfully!"
+
+# Convenience target to run all checks
+check: lint test
+	@echo "✨ All checks completed successfully!"