Add TODO for shakapacker.yml integration enhancement

Reference feature/shakapacker-yml-integration branch for future enhancement
to automatically detect server_bundle_output_path from shakapacker.yml
when using Shakapacker v8.5.0+.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: justin808

lib/react_on_rails/configuration.rb

@@ -56,6 +56,9 @@ def self.configuration
       server_bundle_output_path: "ssr-generated",
       enforce_private_server_bundles: false
     )
+    # TODO: Add automatic detection of server_bundle_output_path from shakapacker.yml
+    # See feature/shakapacker-yml-integration branch for implementation
+    # Requires Shakapacker v8.5.0+ and semantic version checking
   end
 
   class Configuration