feat: cpu module

include/modules/cpu.hpp

@@ -0,0 +1,20 @@
+#pragma once
+
+#include <gtkmm.h>
+#include <fmt/format.h>
+#include <sys/sysinfo.h>
+#include <thread>
+#include "util/chrono.hpp"
+
+namespace waybar::modules {
+
+  class Cpu {
+    public:
+      Cpu();
+      operator Gtk::Widget &();
+    private:
+      Gtk::Label _label;
+      waybar::util::SleeperThread _thread;
+  };
+
+}