Add marketplace component for skill unlocking and update related resources

resources/skills/ice_brick.tres

@@ -0,0 +1,17 @@
+[gd_resource type="Resource" script_class="SkillData" load_steps=4 format=3 uid="uid://cx5fsbexblp60"]
+
+[ext_resource type="PackedScene" uid="uid://bcmx07k12gcsc" path="res://objects/ice_brick.tscn" id="1_ci3d1"]
+[ext_resource type="PackedScene" uid="uid://coayig4dxelo2" path="res://objects/player_skills/brick_throw_skill.tscn" id="1_rflri"]
+[ext_resource type="Script" path="res://scripts/resources/skill_data.gd" id="2_pspkt"]
+
+[resource]
+script = ExtResource("2_pspkt")
+name = "Ice brick"
+description = "Allows you to throw ice bricks at enemies"
+node = ExtResource("1_rflri")
+config = {
+"brick_scene": ExtResource("1_ci3d1"),
+"player_controller": NodePath("."),
+"timer": NodePath("ThrowTimer")
+}
+cost = 150