Add Dockerfile and run scripts for containerized crash cart adapter

Wraps the NOTECONS02 USB Crash Cart Adapter software (usb-crash-cart-adapter
v20240517) in an Ubuntu 16.04 Docker container to resolve incompatibilities
with modern Fedora. Includes X11/XWayland passthrough, USB device access,
and host udev rules for the crash cart adapter (vendor 152a, products 8460/8463).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

docker-run.sh

@@ -0,0 +1,31 @@
+#!/bin/bash
+set -euo pipefail
+
+IMAGE="usb-crash-cart"
+
+# On Fedora with Wayland, XWayland provides X11 compatibility.
+# DISPLAY is still set (e.g. :0 or :1) and /tmp/.X11-unix still exists.
+if [ -z "${DISPLAY:-}" ]; then
+    echo "Error: DISPLAY is not set. Ensure XWayland is running (it should be by default on Fedora)."
+    exit 1
+fi
+
+# xhost grants the container access via hostname-based access control,
+# bypassing the need to pass the raw cookie in some setups.
+xhost +local:docker 2>/dev/null || echo "Warning: xhost failed — display access may not work"
+
+# Under XWayland, X11 auth is cookie-based (XAUTHORITY file).
+# Pass it into the container so the app can authenticate with XWayland.
+XAUTH_ARGS=()
+if [ -n "${XAUTHORITY:-}" ] && [ -f "${XAUTHORITY}" ]; then
+    XAUTH_ARGS=(-e XAUTHORITY="${XAUTHORITY}" -v "${XAUTHORITY}:${XAUTHORITY}:ro")
+fi
+
+# Pass all USB bus devices so the app can find the crash cart adapter.
+# The udev rules (install via install-udev-rules.sh) set permissions on the host.
+docker run --rm \
+    -e DISPLAY="${DISPLAY}" \
+    "${XAUTH_ARGS[@]}" \
+    -v /tmp/.X11-unix:/tmp/.X11-unix \
+    --device /dev/bus/usb \
+    "${IMAGE}" "$@"