docs: update README

docs/README.md

@@ -7,6 +7,16 @@
 
 A user-friendly library for Data Science in Python.
 
+We do not implement data science methods from scratch but instead offer a consistent interface to commonly used functionality from existing libraries like
+
+* [pandas](https://pandas.pydata.org) for data manipulation,
+* [scikit-learn](https://scikit-learn.org) for machine learning, and
+* [seaborn](https://seaborn.pydata.org) for visualization.
+
+Note that this library is still in development and not yet ready for production. Expect breaking changes in the future without a major version bump (while in the `0.x.y` version range).
+
+Feedback is very welcome! If you have a suggestion or find a bug, please [open an issue](https://github.com/Safe-DS/Stdlib/issues/new/choose). If you have a question, please [use our discussion forum](https://github.com/orgs/Safe-DS/discussions).
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 ## Documentation
 
 You can find the full documentation [here](https://stdlib.safe-ds.com).