Added first setup of level-based system

Level1/wave1.tres

@@ -0,0 +1,13 @@
+[gd_resource type="Resource" script_class="WaveConfig" format=3 uid="uid://cygfdfqhk2vhw"]
+
+[ext_resource type="Script" uid="uid://cbwxa2a4hfcy4" path="res://Scripts/Resources/enemy.gd" id="1_ijigs"]
+[ext_resource type="Script" uid="uid://bp6q371iypd06" path="res://Scripts/wave_config.gd" id="2_tihwe"]
+[ext_resource type="Resource" uid="uid://8eba45hql7bo" path="res://Enemies/EyeDog/eye_dog.tres" id="2_ywnes"]
+
+[resource]
+script = ExtResource("2_tihwe")
+enemies = Dictionary[ExtResource("1_ijigs"), int]({
+ExtResource("2_ywnes"): 4
+})
+rewards_blank_cassette = true
+metadata/_custom_type_script = "uid://bp6q371iypd06"