✨ add basic GUI command

- creates relative large executable (740 MB)

Author: enryH

gui/README.md

@@ -18,3 +18,22 @@ Can be started locally with
 # from within gui directory
 python app.py
 ```
+
+## Build executable GUI
+
+For now do not add the `--windowed` option, as it will not show the console output,
+which is useful for debugging and especially terminating any running processes, e.g.
+as the streamlit server and the GUI itself.
+
+```bash
+# from this README folder
+pyinstaller \
+-n vuegen_gui \
+--no-confirm \
+--onedir \
+--collect-all pyvis \
+--collect-all streamlit \
+--collect-all  st_aggrid  \
+--collect-all customtkinter \
+app.py
+```