Add documentation

examples/waybar-config

@@ -0,0 +1,16 @@
+// Copy this file to $HOME/.config/waybar/config and remove this line to see it in action
+[
+    {
+        "layer": "bottom",
+        "position": "top",
+        "modules-left": ["custom/org"],
+        "modules-center": ["clock"],
+        "modules-right": [],
+        "custom/org": {
+            "format": " {}",
+            "return-type": "json",
+            "restart-interval": 5,
+            "exec": "cat /home/yourusername/.cache/waybar-current-task.json"
+        }
+    }
+]