Refactor toolchain packaging process by introducing package-toolchain.sh

- Replaced the packaging logic in build-toolchain.sh with a call to the new package-toolchain.sh script for better organization and maintainability.
- Added package-toolchain.sh to handle the stripping and archiving of the toolchain, including necessary checks for the installation directory and environment script.
- Updated README.md to document the addition of package-toolchain.sh for clarity on the build process.

package-toolchain.sh

@@ -0,0 +1,36 @@
+#!/bin/bash
+set -e
+
+source "$(dirname "$0")/versions.sh"
+
+TOP="$(pwd)"
+TARGET="${1:-arm-uclinuxfdpiceabi}"
+SUBARCH="${2:-armv7-m}"
+INSTALL_DIR="${3:-${TOP}/build/install}"
+
+if [ ! -d "${INSTALL_DIR}" ]; then
+    echo "Ошибка: директория установки не найдена: ${INSTALL_DIR}"
+    exit 1
+fi
+
+if [ ! -f "${TOP}/scripts/env.sh" ]; then
+    echo "Ошибка: файл окружения не найден: ${TOP}/scripts/env.sh"
+    exit 1
+fi
+
+echo "== Strip toolchain и упаковка =="
+
+WDIR="$(mktemp -d)"
+trap 'rm -rf "$WDIR"' EXIT
+
+ARCHIVE_TOOLCHAIN_DIR="${WDIR}/${TARGET}"
+mkdir -p "${ARCHIVE_TOOLCHAIN_DIR}"
+cp -a "${INSTALL_DIR}"/* "${ARCHIVE_TOOLCHAIN_DIR}/"
+cp -a "${TOP}/scripts/env.sh" "${WDIR}/env.sh"
+
+find "${ARCHIVE_TOOLCHAIN_DIR}" -type f -executable -exec strip -p {} \; 2>/dev/null || true
+
+ARCHIVE_NAME="toolset-jlv-${SUBARCH}-gcc${GCC_VER}-uclibc${UCLIBC_VER}.tar.xz"
+tar -C "${WDIR}" --owner=0 --group=0 -cJf "${ARCHIVE_NAME}" "${TARGET}" "env.sh"
+
+echo "Готово: ${ARCHIVE_NAME}"