Add tui header and source to cli namespace

src/cli/tui.cc

@@ -0,0 +1,29 @@
+#include "tui.h"
+
+#include <ftxui/component/component.hpp>
+#include <ftxui/dom/elements.hpp>
+#include <ftxui/screen/screen.hpp>
+
+namespace yaze {
+namespace cli {
+namespace tui {
+
+void ShowMain() {
+  using namespace ftxui;
+
+  Element main_document = gridbox({
+      {text("z3ed: The Legend of Zelda: A Link to the Past") | bold | flex},
+      {text("left") | border, text("middle") | border | flex},
+      {text("left") | border, text("middle") | border | flex},
+  });
+
+  auto screen = Screen::Create(Dimension::Full(),       // Width
+                               Dimension::Fit(main_document) // Height
+  );
+  Render(screen, main_document);
+  screen.Print();
+}
+
+} // namespace tui
+} // namespace cli
+} // namespace yaze