Sophisticated Backpacks: Realistic Crafting

Changes the crafting backpack, making it more complex and realistic.

Uses 8 new components with multi-step recipes.

The mod replaces the simple backpack recipe with a realistic chain of 8 components: Grass Rope (rope made from grass for tying), Wax Resin (wax resin for waterproofing, with an alt. recipe via TFMG creosote), Iron Buckle (buckle made from nuggets), Leather Strap (leather belt with stitching), Leather Strap with Iron Buckle (belt + buckle = adjustable straps), Reinforced Leather Fabric (leather + wool + wax = waterproof fabric for the walls), Backpack Frame (sticks + thread + iron = a rigid frame) and Magnetic Clasp (nuggets + redstone = a magnetic clasp) - all assembled into the final 3x3 craft, where each element stands in its place: fabric on the sides, clasp on top, straps for carrying, frame at the bottom, ropes at the corners, chest in the center as an internal volume.