add popover component

include/components/popover.hpp

@@ -0,0 +1,19 @@
+#pragma once
+
+#include <gtkmm/button.h>
+#include <gtkmm/popover.h>
+
+#include <string>
+
+class Popover: public Gtk::Button {
+public:
+    Popover(std::string icon, std::string name);
+    ~Popover() override;
+
+protected:
+    void on_toggle_window();
+    Gtk::Popover* popover = nullptr;
+    void set_popover_child(Gtk::Widget& child) {
+        gtk_popover_set_child(popover->gobj(), child.gobj());
+    }
+};