docs(mkdocs): offline install, stackbar, border style

docs/common-workflows/active-window-border.md

@@ -7,6 +7,7 @@ file.
 ```json
 {
   "active_window_border": true,
+  "active_window_border_style": "Rounded",
   "active_window_border_colours": {
     "single": {
       "r": 66,
@@ -23,7 +24,7 @@ file.
       "g": 51,
       "b": 153
     }
-  }
+  },
 }
 
 ```
@@ -31,7 +32,7 @@ file.
 It is important to note that the active window border will only apply to
 windows managed by `komorebi`.
 
-This feature is not considered stable and you may encounter visual artifacts
+This feature is not considered stable, and you may encounter visual artifacts
 from time to time.
 
 [![Watch the tutorial

docs/common-workflows/stackbar.md

@@ -0,0 +1,23 @@
+# Stackbar
+
+If you would like to add a visual stackbar to show which windows are in a container
+stack ensure the following options are defined in the `komorebi.json` configuration
+file.
+
+```json
+{
+  "stackbar": {
+    "height": 40,
+    "mode": "OnStack",
+    "tabs": {
+      "width": 300,
+      "focused_text": "#00a542",
+      "unfocused_text": "#b3b3b3",
+      "background": "#141414"
+    }
+  }
+}
+```
+
+This feature is not considered stable, and you may encounter visual artifacts
+from time to time.