refactor(new_editor/app): reorganize host structure and add smoke test

new_editor/app/Support/TextFormat.h

@@ -0,0 +1,19 @@
+#pragma once
+
+#include <string>
+
+namespace XCEngine::UI::Editor::Support {
+
+inline std::string TruncateText(const std::string& text, std::size_t maxLength) {
+    if (text.size() <= maxLength) {
+        return text;
+    }
+
+    if (maxLength <= 3u) {
+        return text.substr(0u, maxLength);
+    }
+
+    return text.substr(0u, maxLength - 3u) + "...";
+}
+
+} // namespace XCEngine::UI::Editor::Support