Add Pro license files to indicate separate licensing

- Add LICENSE.md files to both Pro directories (Ruby and NPM)
- Files reference root REACT-ON-RAILS-PRO-LICENSE.md for consistency
- Clearly indicate Pro files are omitted from OSS distributions
- Pro directories now have explicit licensing documentation

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

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

Author: justin808

lib/react_on_rails/pro/LICENSE.md

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+# React on Rails Pro License
+
+The files in this directory and its subdirectories are licensed under the **React on Rails Pro** license, which is separate from the MIT license that covers the core React on Rails functionality.
+
+## License Terms
+
+These files are proprietary software and are **NOT** covered by the MIT license found in the root LICENSE.md file. Usage requires a valid React on Rails Pro license.
+
+## Distribution
+
+Files in this directory will be **omitted** from future distributions of the open source React on Rails Ruby gem. They are exclusively available to React on Rails Pro licensees.
+
+## License Reference
+
+For the complete React on Rails Pro license terms, see: `REACT-ON-RAILS-PRO-LICENSE.md` in the root directory of this repository.
+
+## More Information
+
+For React on Rails Pro licensing information and to obtain a license, please visit:
+- [React on Rails Pro](https://www.shakacode.com/react-on-rails-pro/)
+- Contact: [[email protected]](mailto:[email protected])

node_package/src/pro/LICENSE.md

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+# React on Rails Pro License
+
+The files in this directory and its subdirectories are licensed under the **React on Rails Pro** license, which is separate from the MIT license that covers the core React on Rails functionality.
+
+## License Terms
+
+These files are proprietary software and are **NOT** covered by the MIT license found in the root LICENSE.md file. Usage requires a valid React on Rails Pro license.
+
+## Distribution
+
+Files in this directory will be **omitted** from future distributions of the open source React on Rails NPM package. They are exclusively available to React on Rails Pro licensees.
+
+## License Reference
+
+For the complete React on Rails Pro license terms, see: `REACT-ON-RAILS-PRO-LICENSE.md` in the root directory of this repository.
+
+## More Information
+
+For React on Rails Pro licensing information and to obtain a license, please visit:
+- [React on Rails Pro](https://www.shakacode.com/react-on-rails-pro/)
+- Contact: [[email protected]](mailto:[email protected])