Refactor skill management and marketplace UI for improved functionality

scripts/ui/skill_button.gd

@@ -0,0 +1,22 @@
+class_name SkillButton
+extends Button
+
+@export var skill_data: SkillData
+
+
+func setup() -> void:
+	if not skill_data:
+		return
+
+	icon = skill_data.icon
+	text = tr(skill_data.name)
+
+
+func activate() -> void:
+	set("theme_override_colors/font_color", Color("#49aa10"))
+
+
+func deactivate() -> void:
+	set("theme_override_colors/font_color", Color("#ffffff"))
+	
+