CuasRTUtils: new showConvKernel5dHyperRect(data, roi, scene_titles, title)
  - ImageJ hyperstack [num_vout][num_scenes][roi_w*sub_dim × roi_h*sub_dim]
  - Bottom slider (T): 121 velocities labelled "+vy:+vx"
  - Second slider (Z): scenes
  - Sub-pixels spatially embedded (no NaN separator grid)

CuasDetectRT: add HYPER-RECT save immediately after each RECT save block
  (level-0 and pyramid loop), suffix "-HYPER-RECT" / "-LEV{n}-HYPER-RECT"
Co-authored-by: Claude <claude@elphel.com>