Add marketplace component for skill unlocking and update related resources

resources/skills/explosive_brick.tres

@@ -0,0 +1,17 @@
+[gd_resource type="Resource" script_class="SkillData" load_steps=4 format=3 uid="uid://cdp8sex36vdq2"]
+
+[ext_resource type="PackedScene" uid="uid://5surx230gfw3" path="res://objects/exploding_brick.tscn" id="1_6pfoa"]
+[ext_resource type="PackedScene" uid="uid://coayig4dxelo2" path="res://objects/player_skills/brick_throw_skill.tscn" id="2_e0o8w"]
+[ext_resource type="Script" path="res://scripts/resources/skill_data.gd" id="3_cgsq1"]
+
+[resource]
+script = ExtResource("3_cgsq1")
+name = "Explosive brick"
+description = "Allows you to throw explosive bricks at enemies"
+node = ExtResource("2_e0o8w")
+config = {
+"brick_scene": ExtResource("1_6pfoa"),
+"player_controller": NodePath("."),
+"timer": NodePath("ThrowTimer")
+}
+cost = 180