`.editorconfig`: Enable analyzer for matching folder structure and namespaces

.editorconfig

@@ -243,6 +243,9 @@ dotnet_diagnostic.IDE0004.severity = error
 # IDE0019: Use pattern matching
 csharp_style_pattern_matching_over_as_with_null_check = true:error
 
+# IDE0130: Warn and provide code fixes for when namespaces do not match the folder structure.
+dotnet_diagnostic.IDE0130.severity = warning
+
 # CA2016: Forward the 'CancellationToken' parameter to methods that take one
 dotnet_diagnostic.CA2016.severity = warning