game: add base enemy and rat

scenes/enemies/enemy_base.tscn

@@ -0,0 +1,75 @@
+[gd_scene load_steps=8 format=3 uid="uid://b7vq8xspnlyeu"]
+
+[ext_resource type="Script" uid="uid://dxn17u7ltuibw" path="res://scenes/enemies/enemy_base.gd" id="1_qty17"]
+[ext_resource type="AnimationLibrary" uid="uid://dos4y853hq1gu" path="res://animation/generic_anims.res" id="2_pkqou"]
+
+[sub_resource type="PlaceholderTexture2D" id="PlaceholderTexture2D_pkqou"]
+size = Vector2(32, 32)
+
+[sub_resource type="CircleShape2D" id="CircleShape2D_satqt"]
+radius = 6.0
+
+[sub_resource type="Animation" id="Animation_satqt"]
+length = 0.001
+tracks/0/type = "value"
+tracks/0/imported = false
+tracks/0/enabled = true
+tracks/0/path = NodePath("Sprite2D:position")
+tracks/0/interp = 1
+tracks/0/loop_wrap = true
+tracks/0/keys = {
+"times": PackedFloat32Array(0),
+"transitions": PackedFloat32Array(1),
+"update": 0,
+"values": [Vector2(0, 0)]
+}
+tracks/1/type = "value"
+tracks/1/imported = false
+tracks/1/enabled = true
+tracks/1/path = NodePath("Sprite2D:modulate")
+tracks/1/interp = 1
+tracks/1/loop_wrap = true
+tracks/1/keys = {
+"times": PackedFloat32Array(0),
+"transitions": PackedFloat32Array(1),
+"update": 0,
+"values": [Color(1, 1, 1, 1)]
+}
+
+[sub_resource type="AnimationLibrary" id="AnimationLibrary_qa0nx"]
+_data = {
+&"RESET": SubResource("Animation_satqt")
+}
+
+[sub_resource type="CircleShape2D" id="CircleShape2D_pkqou"]
+
+[node name="EnemyBase" type="CharacterBody2D"]
+collision_layer = 2
+collision_mask = 3
+script = ExtResource("1_qty17")
+
+[node name="Sprite2D" type="Sprite2D" parent="."]
+texture = SubResource("PlaceholderTexture2D_pkqou")
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="."]
+shape = SubResource("CircleShape2D_satqt")
+
+[node name="TargetCast" type="RayCast2D" parent="." groups=["damagable", "enemy"]]
+enabled = false
+collision_mask = 3
+
+[node name="AnimationPlayer" type="AnimationPlayer" parent="."]
+libraries = {
+&"": SubResource("AnimationLibrary_qa0nx"),
+&"generic_anims": ExtResource("2_pkqou")
+}
+
+[node name="ContactDamageCD" type="Timer" parent="."]
+wait_time = 0.5
+
+[node name="NavigationAgent2D" type="NavigationAgent2D" parent="."]
+
+[node name="ShapeCast2D" type="ShapeCast2D" parent="."]
+shape = SubResource("CircleShape2D_pkqou")
+
+[connection signal="animation_finished" from="AnimationPlayer" to="." method="_on_animation_player_animation_finished"]