new: Added info on how to output folder structure for documentation.

documentation-guidelines.md

@@ -31,3 +31,21 @@ Create png images from Draw.io diagrams using the following command.
 ```bash
 drawio -x -f png -b 10 -o <output>.png <file>.drawio
 ```
+
+## Folder Structure
+
+If you want to add an optional folder structure to your documentation, you can use the following command to generate a tree-like structure.
+
+```bash
+ls -R | grep ":$" | sed -e 's/:$//' -e 's/[^-][^\/]*\//--/g' -e 's/^/   /' -e 's/-/|/'     
+```
+
+Example output:
+
+```text
+   |-know-how
+   |-resources
+   |---diagrams
+   |---images
+   |---scripts
+```