feat: image module

Module which renders an image onto the bar.

include/modules/image.hpp

@@ -0,0 +1,34 @@
+#pragma once
+
+#include <fmt/format.h>
+#include <gtkmm/image.h>
+
+#include <csignal>
+#include <string>
+
+#include "ALabel.hpp"
+#include "util/command.hpp"
+#include "util/json.hpp"
+#include "util/sleeper_thread.hpp"
+
+namespace waybar::modules {
+
+class Image : public AModule {
+ public:
+  Image(const std::string&, const std::string&, const Json::Value&);
+  auto update() -> void;
+  void refresh(int /*signal*/);
+
+ private:
+  void delayWorker();
+  void handleEvent();
+
+  Gtk::Image  image_;
+  std::string path_;
+  int         size_;
+  int         interval_;
+
+  util::SleeperThread thread_;
+};
+
+}  // namespace waybar::modules