Add OverworldMap tile editing

src/app/gui/widgets.h

@@ -2,18 +2,72 @@
 #define YAZE_GUI_WIDGETS_H
 
 #include <ImGuiColorTextEdit/TextEditor.h>
+#include <imgui/imgui.h>
+#include <imgui/misc/cpp/imgui_stdlib.h>
+
+#include <vector>
 
 #include "absl/status/status.h"
 #include "app/core/constants.h"
+#include "app/gfx/bitmap.h"
 
 namespace yaze {
+namespace app {
 namespace gui {
 namespace widgets {
 
 TextEditor::LanguageDefinition GetAssemblyLanguageDef();
 
+class BitmapViewer {
+ public:
+  BitmapViewer() : current_bitmap_index_(0) {}
+
+  void Display(const std::vector<gfx::Bitmap>& bitmaps) {
+    if (bitmaps.empty()) {
+      ImGui::Text("No bitmaps available.");
+      return;
+    }
+
+    // Display the current bitmap index and total count.
+    ImGui::Text("Viewing Bitmap %d / %zu", current_bitmap_index_ + 1,
+                bitmaps.size());
+
+    // Buttons to navigate through bitmaps.
+    if (ImGui::Button("<- Prev")) {
+      if (current_bitmap_index_ > 0) {
+        --current_bitmap_index_;
+      }
+    }
+    ImGui::SameLine();
+    if (ImGui::Button("Next ->")) {
+      if (current_bitmap_index_ < bitmaps.size() - 1) {
+        ++current_bitmap_index_;
+      }
+    }
+
+    // Display the current bitmap.
+    const gfx::Bitmap& current_bitmap = bitmaps[current_bitmap_index_];
+    // Assuming Bitmap has a function to get its texture ID, and width and
+    // height.
+    ImTextureID tex_id = current_bitmap.texture();
+    ImVec2 size(current_bitmap.width(), current_bitmap.height());
+    ImGui::Image(tex_id, size);
+
+    // Scroll if the image is larger than the display area.
+    if (ImGui::BeginChild("BitmapScrollArea", ImVec2(0, 0), false,
+                          ImGuiWindowFlags_HorizontalScrollbar)) {
+      ImGui::Image(tex_id, size);
+      ImGui::EndChild();
+    }
+  }
+
+ private:
+  int current_bitmap_index_;
+};
+
 }  // namespace widgets
 }  // namespace gui
+}  // namespace app
 }  // namespace yaze
 
 #endif