Add official VoxelMorph CT registration pipeline

scripts/setup_env.sh

@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+ENV_NAME="${ENV_NAME:-voxelmorph-head-ct}"
+
+conda env create -f environment.yml
+conda run -n "${ENV_NAME}" python -m pip install --no-cache-dir -r requirements.txt
+conda run -n "${ENV_NAME}" python - <<'PY'
+import os
+os.environ.setdefault("NEURITE_BACKEND", "pytorch")
+os.environ.setdefault("VXM_BACKEND", "pytorch")
+
+import torch
+import voxelmorph as vxm
+import neurite as ne
+
+print("torch:", torch.__version__)
+print("cuda:", torch.cuda.is_available())
+if torch.cuda.is_available():
+    print("gpu:", torch.cuda.get_device_name(0))
+print("voxelmorph VxmPairwise:", hasattr(vxm.nn.models, "VxmPairwise"))
+print("neurite NCC:", hasattr(ne.nn.modules, "NCC"))
+PY