Expose the existing LevenshteinDistance code to blueprints

BlueprintLibraryLD.h

#pragma once

#include "CoreMinimal.h"
#include "Kismet/BlueprintFunctionLibrary.h"
#include "BlueprintLibraryLD.generated.h"

UCLASS()
class YOURPROJECT_API UBlueprintLibraryLD : public UBlueprintFunctionLibrary
{
    GENERATED_BODY()

public:

    // Uses UE's templated Algo::LevenshteinDistance
    UFUNCTION(BlueprintCallable, Category="MyFunctions")
    static int32 LevenshteinDistance(const FString& A, const FString& B);
};