docs: add back root README

README.md

@@ -0,0 +1,12 @@
+# Safe-DS Stdlib
+
+[![PyPI](https://img.shields.io/pypi/v/safe-ds)](https://pypi.org/project/safe-ds/)
+[![Main](https://github.com/lars-reimann/Safe-DS/actions/workflows/main.yml/badge.svg)](https://github.com/Safe-DS/Stdlib/actions/workflows/main.yml)
+[![codecov](https://codecov.io/gh/Safe-DS/Stdlib/branch/main/graph/badge.svg?token=HVRP1633B1)](https://codecov.io/gh/Safe-DS/Stdlib)
+[![Documentation Status](https://readthedocs.org/projects/safe-ds-stdlib/badge/?version=latest)](https://safe-ds-stdlib.readthedocs.io/en/latest/?badge=latest)
+
+A user-friendly library for Data Science in Python.
+
+You can find the full documentation [here][docs].
+
+[docs]: https://safe-ds-stdlib.readthedocs.io/en/latest/