Cleanup groupby (#16)

* update groupby example to be more reproducible

* add pyproject.toml for uv

Author: ianhi

gallery/2d_groupby.ipynb

@@ -0,0 +1,19 @@
+[project]
+name = "xarray-for-biology"
+version = "0.1.0"
+description = "Add your description here"
+readme = "README.md"
+requires-python = ">=3.13"
+dependencies = [
+  "flox>=0.10.6",
+  "jupyter-book>=1.0.4.post1",
+  "jupyterlab>=4.4.7",
+  "matplotlib>=3.10.6",
+  "numpy>=2.3.2",
+  "scikit-image>=0.25.2",
+  "xarray>=2025.8.0",
+]
+
+[dependency-groups]
+dev = ["jupyterlab-myst>=2.4.2"]
+vim = ["jupyterlab-vim>=4.1.4"]