Integrate G15 submodules with Debian 13 packaging and devcontainer

.devcontainer/initialize.sh

@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Require a local native Linux daemon, not SSH/TCP or Docker Desktop's VM.
+[[ $(uname -s) == Linux ]] || { echo 'Local Linux Docker required.' >&2; exit 1; }
+if [[ -n ${DOCKER_CONTEXT:-} ]]; then
+    endpoint=$(docker context inspect "$DOCKER_CONTEXT" --format '{{.Endpoints.docker.Host}}')
+elif [[ -n ${DOCKER_HOST:-} ]]; then
+    endpoint=$DOCKER_HOST
+else
+    endpoint=$(docker context inspect --format '{{.Endpoints.docker.Host}}')
+fi
+[[ $endpoint == unix://* ]] || { echo 'Remote Docker endpoints are unsupported.' >&2; exit 1; }
+os=$(docker info --format '{{.OperatingSystem}}')
+[[ $os != *"Docker Desktop"* ]] || { echo 'Docker Desktop USB mapping is unsupported.' >&2; exit 1; }
+
+# shellcheck source=.devcontainer/usb.sh
+source "$(dirname "${BASH_SOURCE[0]}")/usb.sh"
+output="$(dirname "${BASH_SOURCE[0]}")/compose.usb.yaml"
+tmp=$(mktemp "$output.tmp.XXXXXX")
+trap 'rm -f "$tmp"' EXIT
+generate_usb /sys/bus/usb/devices /dev/bus/usb > "$tmp"
+mv "$tmp" "$output"