Add sample data URL in User Guide (#67)

src/user/index.md

@@ -1,6 +1,12 @@
 (target-user-guide)=
 # User Guide
-This guide contains tutorials for learning the basics, and how-to guides targeted at specific tasks.
+This guide contains tutorials and how-to guides for using Aeon. 
+The tutorials offer a broader, goal-oriented context, and contain end-to-end examples of how Aeon can be used to collect, process and analyse data. 
+The how-to guides offer a more focused, task-oriented context, and provide detailed instructions on how to use specific features or modules of Aeon.
+
+To demonstrate Aeon's various features and capabilities, we also provide the following sample datasets that complement the user guide.
+
+- [**Single mouse in a foraging assay**](https://doi.org/10.5281/zenodo.13881884): A two-hour snippet of a single mouse in a foraging assay consisting of three food patches.
 
 :::{toctree}
 :maxdepth: 2