Adventure Tents 2.3.5 — Sleeping Bag Height Visual Update

Visual-only change from the 2.3.5 alignment build:
- Colored sleeping-bag body shell: 0.450 blocks tall.
- White pillow shell: 0.500 blocks tall.
- Horizontal scale/overhang remains 1.060 blocks.
- Bottom alignment remains unchanged, so the added height grows upward around a sleeping player.
- Native minecraft:straw_bed blocks and all sleep/packing/placement/reliability logic are unchanged.
- /reload reconstructs the display shells at the new heights.
