feat(wincolor_sink): support print utf-8 string to non-unicode windows console.

include/spdlog/sinks/wincolor_sink-inl.h

@@ -145,8 +145,14 @@ void SPDLOG_INLINE wincolor_sink<ConsoleMutex>::print_range_(const memory_buf_t
 {
     if (end > start)
     {
-        auto size = static_cast<DWORD>(end - start);
-        auto ignored = ::WriteConsoleA(static_cast<HANDLE>(out_handle_), formatted.data() + start, size, nullptr, nullptr);
+        auto size = end - start;
+#ifdef SPDLOG_WCHAR_TO_UTF8_SUPPORT
+        wmemory_buf_t buf;
+        details::os::utf8_to_wstrbuf(string_view_t(formatted.data() + start, size), buf);
+        auto ignored = ::WriteConsoleW(static_cast<HANDLE>(out_handle_), buf.data(), static_cast<DWORD>(buf.size()), nullptr, nullptr);
+#else
+        auto ignored = ::WriteConsoleA(static_cast<HANDLE>(out_handle_), formatted.data() + start, static_cast<DWORD>(size), nullptr, nullptr);
+#endif
         (void)(ignored);
     }
 }