added credits

Credits.md

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+---
+icon: verified
+label: Credits
+---
+
+ANN4j is professionally built and maintained by Aatmaj-Zephyr. 👏🏻
+
+It has been developed for the purpose of helping researchers develop new algorithms. It is open source under the MIT license.
+
+In case you want to contribute to the project, please refer the [contributors guidelines](https://github.com/Aatmaj-Zephyr/ANN4j/blob/main/CONTRIBUTING.md).
+
+Please consider staring the [repository](https://github.com/Aatmaj-Zephyr/ANN4j) and following the user [Aatmaj-Zephyr](https://github.com/Aatmaj-Zephyr)