Functions multiMatch[Fuzzy] now handle empty needle argument gracefully

Why it matters

To improve the robustness and usability of the multiMatch[Fuzzy] functions by preventing errors caused by empty needle arguments, allowing queries to handle empty inputs gracefully without failing.

How to use it

Users can continue using the multiMatchFuzzy functions as before. Now, if the needle argument is empty, the functions will not raise errors and will handle the input silently.