add clock to bar

src/widgets/clock.cpp

@@ -0,0 +1,15 @@
+#include "widgets/clock.hpp"
+
+#include <chrono>
+#include <iomanip>
+
+bool Clock::onUpdate() {
+    auto now = std::chrono::system_clock::to_time_t(std::chrono::system_clock::now());
+    
+    std::stringstream ss;
+    ss << std::put_time(std::localtime(&now), "%H:%M:%S");
+
+    set_text(ss.str());
+
+    return true;
+}