Add signal and p2p connection status windows

src/single_window/status_bar.cpp

@@ -0,0 +1,39 @@
+#include "localization.h"
+#include "render.h"
+
+int Render::StatusBar() {
+  ImGui::PushStyleColor(ImGuiCol_MenuBarBg, ImVec4(0, 0, 0, 1));
+  static bool a, b, c, d, e;
+  ImGui::SetNextWindowPos(
+      ImVec2(0, main_window_height_ - status_bar_height_ - 1),
+      ImGuiCond_Always);
+
+  ImGui::BeginChild(
+      "StatusBar", ImVec2(main_window_width_, status_bar_height_ + 1),
+      ImGuiChildFlags_Border,
+      ImGuiWindowFlags_NoDecoration | ImGuiWindowFlags_NoBringToFrontOnFocus);
+
+  ImDrawList* draw_list = ImGui::GetWindowDrawList();
+  draw_list->AddCircleFilled(
+      ImVec2(15, main_window_height_ - status_bar_height_ + 9.0f), 5,
+      ImColor(signal_connected_ ? 0.0f : 1.0f, signal_connected_ ? 1.0f : 0.0f,
+              0.0f),
+      100);
+  draw_list->AddCircle(
+      ImVec2(15, main_window_height_ - status_bar_height_ + 10.0f), 6,
+      ImColor(1.0f, 1.0f, 1.0f), 100);
+
+  ImGui::SetWindowFontScale(0.5f);
+  draw_list->AddText(
+      ImVec2(25, main_window_height_ - status_bar_height_ + 3.0f),
+      ImColor(0.0f, 0.0f, 0.0f),
+      signal_connected_
+          ? localization::signal_connected[localization_language_index_].c_str()
+          : localization::signal_disconnected[localization_language_index_]
+                .c_str());
+  ImGui::SetWindowFontScale(1.0f);
+
+  ImGui::PopStyleColor();
+  ImGui::EndChild();
+  return 0;
+}