Bigger Boats 1.0.0

• Lets up to four players ride in one vanilla boat.
• Server-side first: install on the Fabric server for gameplay support.
• Clients can stay unmodded, though extra riders may visually overlap with vanilla rendering.
• Optional client install adds cleaner seat spacing and stretches the rendered boat when three or four passengers are aboard.
• Does not add new recipes, items, blocks, or custom boat entities.