By Giuseppe Fonte and Gavin Jones ROME (Reuters) -Italy’s new government unveiled its first public finance targets on Friday, hiking borrowing to finance support measures for families and firms struggling with sky-high energy costs. The Treasury’s annual Economic and Financial Document (DEF) approved by Giorgia Meloni’s cabinet set the 2023 fiscal deficit at 4.5% of gross domestic product, up from a 3.4% forecast made in September by the previous government of Mario Draghi. The new figures give Meloni room for measures worth around 1.1% of GDP to expand the economy, while keeping the deficit-t…