Refactor animation generation: replace create_walk.gd with create_animations.gd

- Removed the old create_walk.gd script, which generated walk animations.
- Introduced create_animations.gd to unify the generation of walk_left, walk_right, and stand_up animations.
- Added a new SpinBox for rest timeout configuration in physics_test_harness.gd.
- Enhanced StickmanRig to support automatic recovery from ragdoll state with configurable timeout.
- Implemented recovery logic in StickmanRig, allowing for smooth transitions from ragdoll to animated state.
- Updated animation generation logic to use new pose templates for standing and lying down positions.

scripts/physics_test_harness.gd

@@ -62,6 +62,9 @@ var _rig: StickmanRig = null
 ## Top-bar mode toggle button (text flips "Stickman" <-> "Ragdoll").
 var _ragdoll_toggle: Button = null
 
+## Rest-timeout spinbox (director-controlled auto-recovery delay).
+var _rest_timeout_spinbox: SpinBox = null
+
 # ---------------------------------------------------------------------------
 # Lifecycle
 # ---------------------------------------------------------------------------
@@ -149,6 +152,36 @@ func _build_ui() -> void:
 	knock_btn.pressed.connect(_knock_up)
 	hbox.add_child(knock_btn)
 
+	var rest_label := Label.new()
+	rest_label.text = "Rest"
+	hbox.add_child(rest_label)
+
+	_rest_timeout_spinbox = SpinBox.new()
+	_rest_timeout_spinbox.min_value = 0.1
+	_rest_timeout_spinbox.max_value = 10.0
+	_rest_timeout_spinbox.step = 0.1
+	_rest_timeout_spinbox.value = 2.0
+	_rest_timeout_spinbox.value_changed.connect(_on_rest_timeout_changed)
+	hbox.add_child(_rest_timeout_spinbox)
+
+	var recover_btn := Button.new()
+	recover_btn.text = "Recover Now"
+	recover_btn.pressed.connect(_recover_now)
+	hbox.add_child(recover_btn)
+
+	if _rig != null:
+		_rest_timeout_spinbox.value = _rig.rest_timeout
+
+
+func _on_rest_timeout_changed(v: float) -> void:
+	if _rig != null:
+		_rig.rest_timeout = v
+
+
+func _recover_now() -> void:
+	if _rig != null:
+		_rig.request_recovery()
+
 
 func _on_ragdoll_toggled(pressed: bool) -> void:
 	if _rig == null:
@@ -223,8 +256,20 @@ func _spawn_rig() -> void:
 	rig.position = RIG_SPAWN_POSITION
 	add_child(rig)
 	_rig = rig
+	rig.state_changed.connect(_on_rig_state_changed)
 	_add_rig_collision_proxy()
 
+
+## Keeps the best-effort collision proxy in sync with the rig's physics mode:
+## the ragdoll collides directly with the terrain, so the proxy is removed
+## during RAGDOLL and re-added otherwise. Proxy helpers are idempotent.
+func _on_rig_state_changed(new_state: int) -> void:
+	if new_state == StickmanRig.RigState.RAGDOLL:
+		_remove_rig_collision_proxy()
+	else:
+		_add_rig_collision_proxy()
+	_update_ragdoll_toggle()
+
 # ---------------------------------------------------------------------------
 # Dynamic prop spawning (keys 1/2/3)
 # ---------------------------------------------------------------------------