Uv packager test

There's a new (yet another) package manager for python, uv. https://docs.astral.sh/uv/

It is close to pip but has some nice features.

For example "on-the-fly" environments that are fast.

Could be good for examples etc.

cd examples

uv run jupyter lab

And then one is up and running..

README.md

@@ -295,3 +295,10 @@ python3 -m twine upload dist/*
 ```bash
 python3 -m pip install --upgrade orekit-jpype
 ```
+
+## Running examples using uv package manager
+uv is a package manager that can install environments on the fly quickly.
+To run the examples in jupyter lab, first install uv and then run
+
+      cd examples
+      uv run jupyter lab