docs(mkdocs): add common workflows section

docs/common-workflows/tray-and-multi-window-applications.md

@@ -0,0 +1,23 @@
+# Tray and Multi-Window Applications
+
+❗️**NOTE**: A significant number of tray and multi-window application rules for
+the most common applications are [already generated for
+you](https://github.com/LGUG2Z/komorebi/#generating-common-application-specific-configurations)
+
+If you are experiencing behaviour where closing a window leaves a blank tile,
+but minimizing the same window does not, you have probably enabled a
+'close/minimize to tray' option for that application. You can tell `komorebi`
+to handle this application appropriately by identifying it via the executable
+name or the window class.
+
+```json
+{
+  "tray_and_multi_window_applications": [
+    {
+      "kind": "Class",
+      "id": "SDL_app",
+      "matching_strategy": "Equals"
+    }
+  ]
+}
+```