feat: add CorradeCompat.h for Corrade StringView/fmt interoperability

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: leoparente

src/CorradeCompat.h

@@ -0,0 +1,18 @@
+#pragma once
+
+#include <Corrade/Containers/StringView.h>
+#include <fmt/format.h>
+#include <string>
+
+inline std::string corrade_to_std_string(Corrade::Containers::StringView view)
+{
+    return {view.data(), view.size()};
+}
+
+template <>
+struct fmt::formatter<Corrade::Containers::StringView> : fmt::formatter<fmt::string_view> {
+    auto format(Corrade::Containers::StringView value, format_context &ctx) const -> format_context::iterator
+    {
+        return fmt::formatter<fmt::string_view>::format(fmt::string_view{value.data(), value.size()}, ctx);
+    }
+};