fix: add LICENSE.md and README.md back into the book

Author: dimitri-yatsenko

book/LICENSE.md

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+---
+title: License
+date: 2024-08-15
+authors:
+  - name: Dimitri Yatsenko
+---
+
+
+© Dimitri Yatsenko, 2024. All rights reserved.
+
+# Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Public License
+
+By exercising the Licensed Rights (defined below), You accept and agree to be bound by the terms and conditions of this Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Public License ("Public License"). To the extent this Public License may be interpreted as a contract, You are granted the Licensed Rights in consideration of Your acceptance of these terms and conditions, and the Licensor grants You such rights in consideration of benefits the Licensor receives from making the Licensed Material available under these terms and conditions.
+
+## 1. License
+
+You are free to:
+- **Share** — copy and redistribute the material in any medium or format
+
+Under the following terms:
+- **Attribution** — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
+- **NonCommercial** — You may not use the material for commercial purposes.
+- **NoDerivatives** — If you remix, transform, or build upon the material, you may not distribute the modified material.
+
+No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.
+
+## 2. Notices:
+
+- You do not have to comply with the license for elements of the material in the public domain or where your use is permitted by an applicable exception or limitation.
+- No warranties are given. The license may not give you all of the permissions necessary for your intended use. For example, other rights such as publicity, privacy, or moral rights may limit how you use the material.

book/README.md

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+---
+title: The DataJoint Book
+date: 2024-08-20
+authors:
+  - name: Dimitri Yatsenko
+---
+
+© Dimitri Yatsenko, 2024. All rights reserved.
+
+[![License: CC BY-NC-ND 4.0](https://img.shields.io/badge/License-CC%20BY--NC--ND%204.0-lightgrey.svg)](https://creativecommons.org/licenses/by-nc-nd/4.0/)
+
+
+# Welcome
+
+Welcome to **The DataJoint Book**. It book provides a complete introduction to database programming for scientific data and computations.
+
+```{image} ./images/neuron.png
+:alt: contemplating neuron
+:class: bg-primary mb-1
+:width: 400px
+:align: center
+```
+
+# License
+
+This work is licensed under the [Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License](LICENSE.md).
+You may share the content as long as you
+* give appropriate credit
+* do not use it for commercial purposes
+* do not make modifications
+
+# Official Documentation
+Official documentation for DataJoint can be found here:
+
+* Overall documentation: https://datajoint.com/docs
+
+* DataJoint-Python Official Documentation: https://datajoint.com/docs/core/datajoint-python/  
+  - hosted at https://github.com/datajoint/datajoint-python/
+
+* Legacy documentation: https://datajoint.github.io/datajoint-docs-original/python/ 
+  - hosted at https://github.com/datajoint/datajoint-docs-original
+
+
+# Contributions
+
+We welcome and appreciate your contributions to this book, whether as a reviewer or as a contributor.
+All contributions will be gratefully acknowledged.
+You may suggest modifications by submitting an issue in the main [GitHub repository](https://github.com/dimitri-yatsenko/datajoint-book/issues) for this book.
+For more substrantial contributions and collaborations, including co-authorship and publications, please contact Dimitri Yatsenko.