feat: add alternating autotiling

toml-spec/spec/spec.yaml

@@ -1064,6 +1064,12 @@ SimpleActionName:
       description: Toggles the current group's direction.
     - value: toggle-tab
       description: Toggles the current group between tabbed and split mode.
+    - value: enable-autotile
+      description: Enables alternating split orientation for newly tiled windows.
+    - value: disable-autotile
+      description: Disables alternating split orientation for newly tiled windows.
+    - value: toggle-autotile
+      description: Toggles alternating split orientation for newly tiled windows.
     - value: toggle-fullscreen
       description: Toggle the currently focused window between fullscreen and windowed.
     - value: enter-fullscreen
@@ -3129,10 +3135,21 @@ Config:
       required: false
       description: |
         Configures whether middle-click pasting is enabled.
-        
+
         Changing this has no effect on running applications.
 
         The default is `true`.
+    autotile:
+      kind: boolean
+      required: false
+      description: |
+        Configures whether autotiling is enabled by default.
+
+        When enabled, newly mapped tiled windows alternate their split
+        orientation automatically. This can also be toggled at runtime via the
+        `enable-autotile`, `disable-autotile`, and `toggle-autotile` actions.
+
+        The default is `false`.
     modes:
       kind: map
       values: