Add help message to fatal error output

Show troubleshooting section when invoke_and_exit_if_failed encounters errors

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

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

Author: justin808

lib/react_on_rails/utils.rb

@@ -57,6 +57,8 @@ def self.invoke_and_exit_if_failed(cmd, failure_message)
         MSG
 
         puts wrap_message(msg)
+        puts ""
+        puts extract_troubleshooting_section
 
         # Rspec catches exit without! in the exit callbacks
         exit!(1)