## Task Create `ibeatles_gui/src/processing.rs`. mpsc channels for progress, atomic cancel flag, worker thread. Follow bm3dornl pattern at `bm3d_gui_egui/src/processing.rs`. Part of Epic #354
Task
Create
ibeatles_gui/src/processing.rs. mpsc channels for progress, atomic cancel flag, worker thread. Follow bm3dornl pattern atbm3d_gui_egui/src/processing.rs.Part of Epic #354