feat(cors): añadida clase de configuración CorsConfig para conectar con el frontend

src/main/java/com/example/apprecetas/cors/CorsConfig.java

+package com.example.apprecetas.cors;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.servlet.config.annotation.CorsRegistry;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+
+@Configuration
+public class CorsConfig {
+
+    @Bean
+    public WebMvcConfigurer corsConfigurer() {
+        return new WebMvcConfigurer() {
+            @Override
+            public void addCorsMappings(CorsRegistry registry) {
+                registry.addMapping("/**")
+                        .allowedOrigins("http://localhost:5173")
+                        .allowedMethods("*")
+                        .allowCredentials(true);
+            }
+        };
+    }
+
+}