Add shiny express example

docs/shiny_express.md

@@ -0,0 +1,6 @@
+In Shiny Express the `output_id` corresponds to the name of the _render_ function.
+For the example below your `output_id` equals `mapgl`. Therefore, you have to listen to `input.mapgl_clicked` to get the map clicked event `input.{output_id}.clicked`.
+
+```python
+-8<-- "getting_started/shiny_express.py"
+```

mkdocs.yml

@@ -15,6 +15,7 @@ nav:
       - Layers: layers.md
       - Deck.GL Layers: deckgl.md
       - Shiny: shiny.md
+      - Shiny Express: shiny_express.md
       - Jupyter: jupyter.md
       - Streamlit: streamlit.md
       - Changelog: changelog.md
@@ -65,4 +66,4 @@ markdown_extensions:
       base_path: [docs/examples, "."]
 
 repo_name: py-maplibregl
-repo_url: https://github.com/eodaGmbH/py-maplibregl
+repo_url: https://github.com/eodaGmbH/py-maplibregl