Move UI folder

UI/UI_label.cpp

@@ -0,0 +1,21 @@
+#include "UI_label.hpp"
+
+UI_label::UI_label(std::string text, Color fg_color, Color bg_color, QObject *parent)
+    : UI_item(UI_LABEL_TYPE, text, 12, fg_color, bg_color, parent)
+{
+}
+
+UI_label::UI_label(const json &j, QObject *parent) : UI_item(UI_LABEL_TYPE, parent)
+{
+    from_json(j);
+}
+
+void UI_label::from_json(const json &j)
+{
+    UI_item::from_json(j);
+}
+
+json UI_label::to_json(size_t id) const
+{
+    return UI_item::to_json(id);
+}