docs(readme): add short project description (#28)

Fixes #14

README.md

@@ -3,13 +3,17 @@
 > ⚠️ Please note that this project is currently under active development. As such, it is considered a work in progress,
 > and breaking changes may be introduced at any time. We encourage users to frequently check back for updates and to
 > exercise caution when using this project in production environments. Contributions and feedback are welcome to help
-> move the project towards a more stable release.
+> move the project towards a more stable release (v1.0.0).
 
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 | :------- | :---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
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+`python-re3data` is a Python library that simplifies interacting with the [re3data](https://www.re3data.org) (Registry
+of Research Data Repositories) [REST API](https://www.re3data.org/api/doc), allowing you to easily retrieve and process
+metadata about research data repositories in a convenient and Pythonic way.
+
 **Table of Contents**
 
 - [Installation](#installation)