Update CODEOWNERS (#3627)

CODEOWNERS

@@ -2,16 +2,24 @@
 * @trufflesecurity/product-eng
 
 # Scanning
-pkg/decoders/ @trufflesecurity/Scanning
-pkg/engine/ @trufflesecurity/Scanning
-pkg/gitparse/ @trufflesecurity/Scanning
-pkg/giturl/ @trufflesecurity/Scanning
-pkg/handlers/ @trufflesecurity/Scanning
-pkg/iobuf/ @trufflesecurity/Scanning
-pkg/sanitizer/ @trufflesecurity/Scanning
-pkg/sources/ @trufflesecurity/Scanning
 pkg/writers/ @trufflesecurity/Scanning
-proto/ @trufflesecurity/Scanning
+
+# Shared
+pkg/decoders/ @trufflesecurity/Scanning @trufflesecurity/OSS
+pkg/engine/ @trufflesecurity/Scanning  @trufflesecurity/OSS
+pkg/gitparse/ @trufflesecurity/Scanning  @trufflesecurity/OSS
+pkg/giturl/ @trufflesecurity/Scanning  @trufflesecurity/OSS
+pkg/handlers/ @trufflesecurity/Scanning  @trufflesecurity/OSS
+pkg/iobuf/ @trufflesecurity/Scanning  @trufflesecurity/OSS
+pkg/sanitizer/ @trufflesecurity/Scanning  @trufflesecurity/OSS
+pkg/sources/ @trufflesecurity/Scanning  @trufflesecurity/OSS
+proto/ @trufflesecurity/Scanning  @trufflesecurity/OSS
+
+# OSS
+pkg/detectors/ @trufflesecurity/OSS
+pkg/common/ @trufflesecurity/OSS
+pkg/custom_detectors/ @trufflesecurity/OSS
+pkg/analzyers/ @trufflesecurity/OSS
 
 # critical detectors
 pkg/detectors/aws/ @trufflesecurity/backend