Add animation style toggle

toml-spec/spec/spec.yaml

@@ -2956,6 +2956,7 @@ Config:
           [animations]
           enabled = true
           duration-ms = 160
+          style = "multiphase"
           curve = "ease-out"
           ```
     xwayland:
@@ -3682,6 +3683,7 @@ Animations:
       [animations]
       enabled = true
       duration-ms = 160
+      style = "multiphase"
       curve = [0.25, 0.1, 0.25, 1.0]
       ```
   fields:
@@ -3700,6 +3702,13 @@ Animations:
         Sets the animation duration in milliseconds.
 
         The default is `160`.
+    style:
+      ref: AnimationStyle
+      required: false
+      description: |
+        Sets the animation style used for tiled window movement animations.
+
+        The default is `multiphase`.
     curve:
       ref: AnimationCurve
       required: false
@@ -3709,6 +3718,21 @@ Animations:
         The default is `ease-out`.
 
 
+AnimationStyle:
+  kind: string
+  description: |
+    Describes a tiled window movement animation style.
+  values:
+    - value: plain
+      description: |
+        Uses a single interpolated movement from each window's current visual
+        rectangle to its destination rectangle.
+    - value: multiphase
+      description: |
+        Uses the no-overlap multiphase planner for tiled window movement when a
+        supported plan exists.
+
+
 AnimationCurve:
   kind: variable
   description: |