feat: add crayfish npc to square map

scenes/characters/crayfish_npc.tscn

@@ -0,0 +1,65 @@
+[gd_scene load_steps=7 format=3]
+
+[ext_resource type="Texture2D" path="res://assets/characters/crayfish_npc_256_256.png" id="1_texture"]
+[ext_resource type="Script" path="res://scenes/characters/NPCController.gd" id="2_script"]
+
+[sub_resource type="RectangleShape2D" id="1_shape"]
+size = Vector2(44, 22)
+
+[sub_resource type="Animation" id="2_reset"]
+length = 0.001
+tracks/0/type = "value"
+tracks/0/imported = false
+tracks/0/enabled = true
+tracks/0/path = NodePath("Sprite2D:frame")
+tracks/0/interp = 1
+tracks/0/loop_wrap = true
+tracks/0/keys = {
+"times": PackedFloat32Array(0),
+"transitions": PackedFloat32Array(1),
+"update": 1,
+"values": [0]
+}
+
+[sub_resource type="Animation" id="3_idle"]
+resource_name = "idle"
+length = 1.2
+loop_mode = 1
+tracks/0/type = "value"
+tracks/0/imported = false
+tracks/0/enabled = true
+tracks/0/path = NodePath("Sprite2D:frame")
+tracks/0/interp = 1
+tracks/0/loop_wrap = true
+tracks/0/keys = {
+"times": PackedFloat32Array(0.0333333, 0.26666665, 0.4666667, 0.8, 1),
+"transitions": PackedFloat32Array(1, 1, 1, 1, 1),
+"update": 1,
+"values": [2, 1, 0, 4, 5]
+}
+
+[sub_resource type="AnimationLibrary" id="4_library"]
+_data = {
+&"RESET": SubResource("2_reset"),
+&"idle": SubResource("3_idle")
+}
+
+[node name="CrayfishNpc" type="CharacterBody2D"]
+script = ExtResource("2_script")
+npc_name = "虾小满"
+dialogue = "欢迎来到 WhaleTown！我是虾小满，负责看着喷泉边的水路和码头消息。想找热闹的地方，顺着水边走就对啦。"
+
+[node name="Sprite2D" type="Sprite2D" parent="."]
+texture = ExtResource("1_texture")
+hframes = 4
+vframes = 4
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="."]
+light_mask = 5
+visibility_layer = 5
+shape = SubResource("1_shape")
+
+[node name="AnimationPlayer" type="AnimationPlayer" parent="."]
+libraries = {
+&"": SubResource("4_library")
+}