Add AppImage install and update bundle

packaging/build-release-bundle.sh

@@ -0,0 +1,55 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+root_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+package_id="$(cargo pkgid --manifest-path "${root_dir}/Cargo.toml")"
+version="${package_id##*@}"
+bundle_name="Comicviewer-${version}-x86_64"
+appimage_name="${bundle_name}.AppImage"
+appimage="${root_dir}/dist/${appimage_name}"
+checksum="${appimage}.sha256"
+archive="${root_dir}/dist/${bundle_name}.tar.gz"
+archive_checksum="${archive}.sha256"
+work_dir="$(mktemp -d)"
+bundle_dir="${work_dir}/${bundle_name}"
+archive_mtime="${SOURCE_DATE_EPOCH:-$(git -C "${root_dir}" log -1 --format=%ct)}"
+
+cleanup() {
+    rm -rf "${work_dir}"
+}
+trap cleanup EXIT
+
+if [[ ! -f "${appimage}" ]]; then
+    printf 'AppImage가 없습니다: %s\n' "${appimage}" >&2
+    printf '%s\n' "먼저 packaging/build-appimage.sh를 실행하세요." >&2
+    exit 1
+fi
+
+mkdir -p "${bundle_dir}"
+(
+    cd "${root_dir}/dist"
+    sha256sum "${appimage_name}" > "${appimage_name}.sha256"
+)
+
+install -m 0755 "${appimage}" "${bundle_dir}/${appimage_name}"
+install -m 0644 "${checksum}" "${bundle_dir}/${appimage_name}.sha256"
+install -m 0755 \
+    "${root_dir}/packaging/install-or-update.sh" \
+    "${bundle_dir}/install-or-update.sh"
+install -m 0644 \
+    "${root_dir}/data/io.github.comicviewer.Comicviewer.desktop" \
+    "${bundle_dir}/io.github.comicviewer.Comicviewer.desktop"
+install -m 0644 \
+    "${root_dir}/data/io.github.comicviewer.Comicviewer.svg" \
+    "${bundle_dir}/io.github.comicviewer.Comicviewer.svg"
+install -m 0644 "${root_dir}/docs/INSTALL.ko.md" "${bundle_dir}/README.ko.md"
+
+tar --sort=name --owner=0 --group=0 --numeric-owner --mtime="@${archive_mtime}" \
+    -C "${work_dir}" -cf - "${bundle_name}" | gzip -n > "${archive}"
+(
+    cd "${root_dir}/dist"
+    sha256sum "$(basename "${archive}")" > "$(basename "${archive_checksum}")"
+)
+
+printf 'Created %s\n' "${archive}"
+printf 'Created %s\n' "${archive_checksum}"