Salicin: Block Scale

New Feature: Block Rotation

• Blocks can now implement IRotatableBlock to get automatic rotation around any axis, at any angle
• Rotation applies to block model rendering, block entity rendering, and collision box translation
• Configurable pivot point for rotation anchor
• Works alongside IScalableBlock: rotate first, scale second
• Collision boxes are intelligently translated to match the rotated model's center (no janky OBB approximations)