feat(recipe/application): implementado servicio para subir la imagen de la receta

src/main/java/com/example/apprecetas/recipe/application/FileUploadUseCase.java

+package com.example.apprecetas.recipe.application;
+
+import org.springframework.web.multipart.MultipartFile;
+
+public interface FileUploadUseCase {
+    String uploadFile(MultipartFile file);
+}

src/main/java/com/example/apprecetas/recipe/application/impl/FileUploadUseCaseImpl.java

+package com.example.apprecetas.recipe.application.impl;
+
+import com.cloudinary.Cloudinary;
+import com.cloudinary.utils.ObjectUtils;
+import com.example.apprecetas.recipe.application.FileUploadUseCase;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Service;
+import org.springframework.web.multipart.MultipartFile;
+
+import java.io.IOException;
+import java.util.Map;
+
+@Service
+public class FileUploadUseCaseImpl implements FileUploadUseCase {
+
+    private final Cloudinary cloudinary;
+
+    public FileUploadUseCaseImpl(
+            @Value("${cloudinary.cloud-name}") String cloudName,
+            @Value("${cloudinary.api-key}") String apiKey,
+            @Value("${cloudinary.api-secret}") String apiSecret) {
+        this.cloudinary = new Cloudinary(ObjectUtils.asMap(
+                "cloud_name", cloudName,
+                "api_key", apiKey,
+                "api_secret", apiSecret,
+                "secure", true));
+    }
+
+    @Override
+    public String uploadFile(MultipartFile file) {
+        try {
+            Map uploadResult = cloudinary.uploader().upload(file.getBytes(), ObjectUtils.emptyMap());
+            return (String) uploadResult.get("url");
+        } catch (IOException e) {
+            throw new RuntimeException("Error al subir el archivo a Cloudinary", e);
+        }
+    }
+}