feat: Implement Phase 16 - Move To: Walk and Run

- Introduced a new action type `move_to` allowing children to direct a stickman to a destination using either Walk or Run styles.
- Updated the ActionEditor UI to include Walk/Run buttons for selecting movement styles.
- Ensured compatibility with existing `walk_to` actions by converting them to the new `move_to` format during loading.
- Defined clear success criteria for the implementation, including distinct movement animations and behavior for both Walk and Run.
- Established a comprehensive verification contract to ensure functionality across various terrains and scenarios.

scenes/characters/stickman/stickman_rig.tscn

@@ -73,6 +73,94 @@ modifications/4 = SubResource("SkeletonModification2DLookAt_j4hao")
 [sub_resource type="Animation" id="Animation_2leu7"]
 length = 0.001
 
+[sub_resource type="Animation" id="Animation_RunRight"]
+length = 0.75
+loop_mode = 1
+tracks/0/type = "value"
+tracks/0/imported = false
+tracks/0/enabled = true
+tracks/0/path = NodePath("IK_Targets/Torso:position")
+tracks/0/interp = 2
+tracks/0/loop_wrap = true
+tracks/0/keys = {
+"times": PackedFloat32Array(0, 0.1875, 0.375, 0.5625, 0.75),
+"transitions": PackedFloat32Array(1, 1, 1, 1, 1),
+"update": 0,
+"values": [Vector2(0, 15), Vector2(0, -30), Vector2(0, 15), Vector2(0, -30), Vector2(0, 15)]
+}
+tracks/1/type = "value"
+tracks/1/imported = false
+tracks/1/enabled = true
+tracks/1/path = NodePath("IK_Targets/Head:position")
+tracks/1/interp = 2
+tracks/1/loop_wrap = true
+tracks/1/keys = {
+"times": PackedFloat32Array(0, 0.1875, 0.375, 0.5625, 0.75),
+"transitions": PackedFloat32Array(1, 1, 1, 1, 1),
+"update": 0,
+"values": [Vector2(100, -605), Vector2(100, -642), Vector2(100, -605), Vector2(100, -642), Vector2(100, -605)]
+}
+tracks/2/type = "value"
+tracks/2/imported = false
+tracks/2/enabled = true
+tracks/2/path = NodePath("AnimationTargets/Right_Leg_Base:position")
+tracks/2/interp = 2
+tracks/2/loop_wrap = true
+tracks/2/keys = {
+"times": PackedFloat32Array(0, 0.1875, 0.375, 0.5625, 0.75),
+"transitions": PackedFloat32Array(1, 1, 1, 1, 1),
+"update": 0,
+"values": [Vector2(80, 390), Vector2(-120, 290), Vector2(-80, 260), Vector2(110, 240), Vector2(80, 390)]
+}
+tracks/3/type = "value"
+tracks/3/imported = false
+tracks/3/enabled = true
+tracks/3/path = NodePath("AnimationTargets/Left_Leg_Base:position")
+tracks/3/interp = 2
+tracks/3/loop_wrap = true
+tracks/3/keys = {
+"times": PackedFloat32Array(0, 0.1875, 0.375, 0.5625, 0.75),
+"transitions": PackedFloat32Array(1, 1, 1, 1, 1),
+"update": 0,
+"values": [Vector2(-80, 260), Vector2(110, 240), Vector2(80, 390), Vector2(-120, 290), Vector2(-80, 260)]
+}
+tracks/4/type = "value"
+tracks/4/imported = false
+tracks/4/enabled = true
+tracks/4/path = NodePath("IK_Targets/Right_Hand:position")
+tracks/4/interp = 2
+tracks/4/loop_wrap = true
+tracks/4/keys = {
+"times": PackedFloat32Array(0, 0.09375, 0.1875, 0.28125, 0.375, 0.46875, 0.5625, 0.65625, 0.75),
+"transitions": PackedFloat32Array(1, 1, 1, 1, 1, 1, 1, 1, 1),
+"update": 0,
+"values": [Vector2(-250, -205), Vector2(-167, -40), Vector2(35, 0), Vector2(237, -40), Vector2(320, -225), Vector2(237, -35), Vector2(35, 15), Vector2(-167, -35), Vector2(-250, -205)]
+}
+tracks/5/type = "value"
+tracks/5/imported = false
+tracks/5/enabled = true
+tracks/5/path = NodePath("IK_Targets/Left_Hand:position")
+tracks/5/interp = 2
+tracks/5/loop_wrap = true
+tracks/5/keys = {
+"times": PackedFloat32Array(0, 0.09375, 0.1875, 0.28125, 0.375, 0.46875, 0.5625, 0.65625, 0.75),
+"transitions": PackedFloat32Array(1, 1, 1, 1, 1, 1, 1, 1, 1),
+"update": 0,
+"values": [Vector2(320, -225), Vector2(237, -30), Vector2(55, 15), Vector2(-167, -35), Vector2(-250, -205), Vector2(-167, -40), Vector2(55, 0), Vector2(237, -40), Vector2(320, -225)]
+}
+tracks/6/type = "value"
+tracks/6/imported = false
+tracks/6/enabled = true
+tracks/6/path = NodePath("IK_Targets/Torso:rotation")
+tracks/6/interp = 2
+tracks/6/loop_wrap = true
+tracks/6/keys = {
+"times": PackedFloat32Array(0, 0.1875, 0.375, 0.5625, 0.75),
+"transitions": PackedFloat32Array(1, 1, 1, 1, 1),
+"update": 0,
+"values": [0.3, 0.36, 0.28, 0.2, 0.3]
+}
+
 [sub_resource type="Animation" id="Animation_ylko5"]
 length = 0.8
 tracks/0/type = "value"
@@ -315,6 +403,7 @@ tracks/5/keys = {
 [sub_resource type="AnimationLibrary" id="AnimationLibrary_t75yq"]
 _data = {
 &"RESET": SubResource("Animation_2leu7"),
+&"run_right": SubResource("Animation_RunRight"),
 &"stand_up": SubResource("Animation_ylko5"),
 &"walk_left": SubResource("Animation_t75yq"),
 &"walk_right": SubResource("Animation_m3sq4")