Implement movement range visualization and refine unit movement logic

Scenes/Unit/unit_base.tscn

@@ -9,8 +9,14 @@ size = Vector2(16, 16)
 size = Vector2(32, 32)
 
 [node name="BaseUnit" type="CharacterBody2D"]
+motion_mode = 1
 script = ExtResource("1_bo1wp")
-currentCell = Vector2i(20, 20)
+unitData = {
+"MoveRange": 10,
+"MoveRangeV": Vector2(5, 5),
+"MoveRangeVi": Vector2i(5, 5),
+"Speed": 400.0
+}
 
 [node name="PathPrev" type="Line2D" parent="."]
 top_level = true
@@ -21,4 +27,5 @@ default_color = Color(0, 0.3372549, 0.3372549, 1)
 texture = SubResource("PlaceholderTexture2D_imbg2")
 
 [node name="CollisionShape2D" type="CollisionShape2D" parent="."]
+scale = Vector2(0.5, 0.5)
 shape = SubResource("RectangleShape2D_hfg1r")