Procedural macro for spider-lib to simplify ScrapedItem implementation.
This module provides the #[scraped_item] attribute macro, which automatically
derives the necessary traits and implementations for a struct to be used as
a ScrapedItem within the spider-lib framework.
By applying this macro to a struct, users can easily define their data structures for scraped items, reducing boilerplate code for serialization, deserialization, cloning, and type conversions required by the library's item processing pipeline.