Add sound effects and character scripts

- Imported new sound effects: "Low Boing", "Low Whoosh", and "Pew" with corresponding import files.
- Created a new character script for "Hen" with basic AI and attack functionality.
- Implemented an effect controller script for managing particle effects with one-shot functionality.

components/Bullets/HenBomb.tscn

@@ -0,0 +1,17 @@
+[gd_scene load_steps=3 format=3 uid="uid://dm6viyjsje6yj"]
+
+[ext_resource type="PackedScene" uid="uid://crtdkysmnkith" path="res://components/Abstracts/BulletBase.tscn" id="1_2l75q"]
+
+[sub_resource type="CircleShape2D" id="CircleShape2D_q8kgb"]
+radius = 60.0
+
+[node name="HenBomb" instance=ExtResource("1_2l75q")]
+fields = {
+0: 10,
+1: 5,
+2: 0
+}
+lifeTime = 100.0
+
+[node name="hitbox" parent="." index="1"]
+shape = SubResource("CircleShape2D_q8kgb")