MTMC_Tracking_2026: trim Warehouse_026/027 test videos to first 60s (labeled window)

Remove map.png from test scenes (hold back for now)

MTMC_Tracking_2026: add real-world test scenes Warehouse_026, Warehouse_027 (videos + calibration + map)

MTMC_Tracking_2026: add test split (videos + calibration + map; no depth_maps / ground_truth) (#20)

MTMC_Tracking_2026: README update (#19)