Inventory, Collection, and Ventba pathing tweaks! — Veiled Vents Steam update #92176

- Ventba should now find the exit more reliably rather than returning to start - Added inventory menu with a collectibles area for special loot - Inventory menu displays depth record, and total levels explored - Depth is now displayed by the inventory menu button - Ventba now collects items and shows haul totals at the end of the run