feat: add nbdime

run_onchange_before_26_nbdime.sh

@@ -0,0 +1,16 @@
+#!/usr/bin/env bash
+set -e
+
+# Install nbdime using pipx
+if ! command -v pipx &> /dev/null; then
+    echo "pipx not found. failed to install nbdime"
+    exit 1
+fi
+
+if pipx list | grep -q nbdime; then
+    echo "nbdime already installed. skipping."
+    exit 0
+fi
+
+echo "Installing nbdime"
+pipx install nbdime