feat(modules): generic label module to allow max-length on all labels

include/ALabel.hpp

@@ -0,0 +1,19 @@
+#pragma once
+
+#include <json/json.h>
+#include "IModule.hpp"
+
+namespace waybar {
+
+class ALabel : public IModule {
+  public:
+    ALabel(Json::Value);
+    virtual ~ALabel();
+    virtual auto update() -> void;
+    virtual operator Gtk::Widget &();
+  protected:
+    Gtk::Label label_;
+    Json::Value config_;
+};
+
+}