bring back gallery blocks (another freebie)

The Gallery block has always been a versatile tool for Squarespace users, allowing the addition of visually appealing image and video galleries across various sections. Squarespace 7.1 limits the availability of Gallery blocks to blog posts, events, and product descriptions, leaving users unable to add them to other sections as they could in version 7.0. Fortunately, with the Classic Gallery block, you can bring back the full functionality of Gallery blocks, making it possible to insert them...