ui: Moved FPS counter to footer

plugins/builtin/source/content/footer_items.cpp

@@ -0,0 +1,21 @@
+#include <hex/plugin.hpp>
+
+#include <windows.h>
+#include <psapi.h>
+
+namespace hex::plugin::builtin {
+
+    void addFooterItems() {
+
+        ContentRegistry::Interface::addFooterItem([] {
+            static float framerate = 0;
+            if (ImGui::HasSecondPassed()) {
+                framerate = ImGui::GetIO().Framerate;
+            }
+
+            ImGui::TextUnformatted(hex::format("FPS {0:.2f}", framerate).c_str());
+        });
+
+    }
+
+}