Добавление нового endpoint: Search items + source

Since you're actively implementing ALFASKINS, there's already a need to parse them (so that regular items don't override the ALFA skins), but
right now the source field is only available in the heavy search-item-by-hash-name-specific method , but there’s too much extra data in the extra field, which clogs up the channel

To avoid breaking the current search-item-by-hash-name method (for other users)
, I suggest adding a new endpoint—an analogue of search-item-by-hash-name, but with the addition of a source field. This will significantly save on traffic for both users and you.