feat: added readme (#86)

* initial README.md

README.md

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+# Intershop Order Management Blueprint Project
+
+Welcome to the Intershop Order Management Blueprint Project!
+
+The Intershop Order Management Blueprint Project is a demo project for demonstration purposes and for learning project development of the Intershop Order Management.
+
+More information about the Intershop Order Management can be found [here](https://www.intershop.com/en/intershop-order-management).
+
+---
+
+## Getting Started
+
+Checkout [How to Start](https://support.intershop.com/kb/index.php/Display/30097C) and
+[Setup Blueprint Project](https://support.intershop.com/kb/index.php/Display/300N95) to start using the demo project.  (Login required)
+
+## License
+
+The Intershop Order Management Blueprint Project is published as [MIT license](./LICENSE).