workshop: pdset.preprocess for DPC+rotation; pdset ready for v2 ptycho

workshop: BF+DF single widget; Show4DSTEM width; drop cross-modality

workshop: explicit rotation pass to DirectPtychography

workshop: add Step 4b rotation curl plot

workshop: optuna aberration fit + ICOM/parallax/SSB order

workshop v2: SSB working via aberration override; CoM via upstream model; per-panel Show2D

docs(README): drop parallax badge (folded into consolidated v1)

workshop: drop parallax notebook (folded into consolidated v1)

workshop: consolidated v1 (BF/DF/DPC + 5 direct kernels + cross-modality)

docs(README): add berk_workshop_parallax_v1 Colab badge

workshop: sync notebooks/berk_workshop_parallax_v1.ipynb

workshop: sync notebooks/berk_workshop_v1.ipynb

workshop: single Show2D for 3 CoM panels

workshop: split BF/DF Show2D widgets + CoM magnitude + hardcoded aperture center

docs(README): add berk_workshop_v1 Colab badge (browse + BF/DF + probe + DPC)

workshop: add berk_workshop_v1 (browse + BF/DF + probe + DPC, Colab T4)

docs(README): quantem pip -> electronmicroscopy/quantem@dev (real branch on github)

nb: pip from electronmicroscopy/quantem@dev (real github branch with from_tensor)

docs(README): Colab badge -> Gist (native Colab URL, opens specific notebook)

docs(README): Colab badge image link (pre-selects T4 via nb metadata)

nb: Colab metadata pre-selects T4 GPU runtime

haadf: move gold_haadf_npy/data.npy into haadf/ bucket

chore: remove misrouted 4dstem/gold_haadf_npy (HAADF belongs in haadf/)

docs(README): one-click Colab link, EMD-confirmed optics, sampling caveat

docs(notebook): add show4dstem_colab.ipynb for one-click Colab workshop

meta(gold_haadf_npy): EMD-confirmed 300 kV / 30 mrad / 91 mm; sampling caveat

meta(gold_512_npy_bin4): EMD-confirmed 300 kV / 30 mrad / 91 mm; sampling caveat

meta(gold_512_npy_bin8): EMD-confirmed 300 kV / 30 mrad / 91 mm; sampling caveat

meta: enrich gold_haadf_npy/meta.json with corrected voltage 300 kV, probe, CL, source

meta: enrich gold_512_npy_bin4/meta.json with corrected voltage 300 kV, probe, CL, source

meta: enrich gold_512_npy_bin8/meta.json with corrected voltage 300 kV, probe, CL, source

chore: remove placeholder tomo/ (only 4dstem + haadf)

chore: remove placeholder raw/ (only 4dstem + haadf)

chore: remove placeholder hrtem/ (only 4dstem + haadf)

chore: remove placeholder eels/ (only 4dstem + haadf)

chore: remove placeholder complex/ (only 4dstem + haadf)

docs(README): add HAADF npy workshop flow + acquisition params table

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docs(README): lead with TestPyPI quantem.widget + Colab; document npy_bin variants

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