feat: Add dungeon editor smoke test and register it in the test suite

- Introduced a new smoke test for the Dungeon Editor to verify UI elements and functionality.
- Registered the Dungeon Editor smoke test in the main test suite for automated execution.
- Updated the integration test setup to ensure proper ROM loading from multiple locations.

test/e2e/dungeon_editor_smoke_test.h

@@ -0,0 +1,9 @@
+#ifndef YAZE_TEST_E2E_DUNGEON_EDITOR_SMOKE_TEST_H
+#define YAZE_TEST_E2E_DUNGEON_EDITOR_SMOKE_TEST_H
+
+#include "imgui_test_engine/imgui_te_context.h"
+
+void E2ETest_DungeonEditorSmokeTest(ImGuiTestContext* ctx);
+
+#endif  // YAZE_TEST_E2E_DUNGEON_EDITOR_SMOKE_TEST_H
+