Update README and LICENSE files

Author: vladimir-litvinchik

LICENSE

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+MIT License
+
+Copyright (c) 2026 GroupDocs.Editor Product Family
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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-Public documentation for [GroupDocs.Editor](https://products.groupdocs.com/editor/).
+# GroupDocs.Editor - Documentation Source Files
+
+This repository contains Markdown files used to generate [GroupDocs.Editor](https://docs.groupdocs.com/editor/) static documentation.
+
+## About GroupDocs.Editor
+
+[GroupDocs.Editor](https://products.groupdocs.com/editor/) is a document editing SDK that enables you to edit documents in various formats including Word, Excel, PowerPoint, and other popular file types.
+
+Available for .NET, Java, and Node.js.
+
+## Repository Purpose
+
+The files in this repository are used to:
+
+- Build and maintain the official [documentation](https://docs.groupdocs.com/editor/).
+- Ensure documentation is always up-to-date with the latest product release.
+- Provide a consistent structure for automated builds and publication.
+
+## How to Use
+
+This repository is not meant for direct use, as it contains source files for generating static content with Hugo.
+
+## Resources
+
+- [Product Page](https://products.groupdocs.com/editor/)
+- [Documentation](https://docs.groupdocs.com/editor/)
+- [API Reference](https://reference.groupdocs.com/editor/)
+- [Free Support Forum](https://forum.groupdocs.com/c/editor/)
+- [Blog](https://blog.groupdocs.com/category/editor/)
+
+## License
+
+This repository contains documentation source files and is licensed under the [MIT License](LICENSE).