Wave of item effects and implementation

Zennysoft.Game.Ma/src/items/effect/resources/Dullness.tres

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+[gd_resource type="Resource" script_class="EffectItemStats" load_steps=3 format=3 uid="uid://dhsdqjlc5lt84"]
+
+[ext_resource type="Texture2D" uid="uid://cwksvcn7ggqag" path="res://src/items/effect/textures/Dullness.png" id="1_p3m2a"]
+[ext_resource type="Script" uid="uid://b5w4iw4iqmxtn" path="res://src/items/effect/EffectItemStats.cs" id="2_vs32u"]
+
+[resource]
+script = ExtResource("2_vs32u")
+UsableItemTag = 24
+ElementalDamageType = 0
+Name = "Spell Sign: Dullness"
+Description = "Permanently Lowers Attack by 1."
+SpawnRate = 0.5
+BonusAttack = 1
+BonusDefense = 0
+BonusLuck = 0
+BonusHP = 0
+BonusVT = 0
+AeolicResistance = 0
+TelluricResistance = 0
+HydricResistance = 0
+IgneousResistance = 0
+FerrumResistance = 0
+HolyResistance = 0
+CurseResistance = 0
+ThrowSpeed = 12.0
+ThrowDamage = 5
+ItemTag = 0
+Texture = ExtResource("1_p3m2a")
+metadata/_custom_type_script = "uid://b5w4iw4iqmxtn"