Release pipeline after PhotoCraft's: AppImage/deb/rpm/Flatpak/tar.gz for Linux x86_64 and aarch64, FreeBSD, a macOS dmg and CLI zip, Windows x64/x86/arm64 MSI and portable zip (plus the plain x64 exe), web zip, SHA256SUMS.txt; version 0.1.2

Adapted from storytold/photocraft's release.yml and packaging/ (Apache-2.0; ATTRIBUTION.md and
NOTICE say so). Packages install the licence files, THIRD-PARTY-LICENSES.txt included. The app
icon is drawn by `solvecraft-cli icon` (a blue block with a bore, rendered on a transparent
background; .ico too), so no image is committed. Notes: a short header plus GitHub's generated
What's Changed. A dry run (Run workflow, publish off) keeps the files as the release-assets
artifact. packaging-lint.yml checks the workflows, scripts and metadata.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

packaging/env.sh

@@ -0,0 +1,65 @@
+# shellcheck shell=bash
+# Shared setup for the packaging scripts. Source it: `. "$(dirname "$0")/../env.sh"`.
+# Adapted from PhotoCraft's packaging (storytold/photocraft, Apache-2.0; see ATTRIBUTION.md).
+#
+# Exports:
+#   ROOT                    workspace root
+#   VERSION                 [workspace.package] version from Cargo.toml (override: SOLVECRAFT_VERSION)
+#   DIST                    output directory for release artifacts (default: $ROOT/dist/release)
+#   SOLVECRAFT_BUILD_DATE   UTC build date, YYYY-MM-DD
+#   CARGO_TARGET_DIR        cargo's target dir (default: $ROOT/target)
+
+ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+export ROOT
+
+# The version lives in one place: `[workspace.package] version` in the root Cargo.toml.
+workspace_version() {
+  awk '
+    /^\[/ { in_pkg = ($0 == "[workspace.package]") ; next }
+    in_pkg && $1 == "version" { gsub(/[" ]/, "", $3); print $3; exit }
+  ' "$ROOT/Cargo.toml"
+}
+
+VERSION="${SOLVECRAFT_VERSION:-$(workspace_version)}"
+if [ -z "$VERSION" ]; then
+  echo "error: could not read [workspace.package] version from $ROOT/Cargo.toml" >&2
+  exit 1
+fi
+export VERSION
+
+DIST="${DIST:-$ROOT/dist/release}"
+mkdir -p "$DIST"
+DIST="$(cd "$DIST" && pwd)"
+export DIST
+
+export SOLVECRAFT_BUILD_DATE="${SOLVECRAFT_BUILD_DATE:-$(date -u +%Y-%m-%d)}"
+export CARGO_TARGET_DIR="${CARGO_TARGET_DIR:-$ROOT/target}"
+APP_ID=ai.storyteller.solvecraft
+export APP_ID
+
+# Emit a GitHub Actions warning (plain stderr outside Actions).
+warn() {
+  if [ -n "${GITHUB_ACTIONS:-}" ]; then echo "::warning::$*"; else echo "warning: $*" >&2; fi
+}
+
+# Copy the licence, notice and readme files into a package directory. The programs also carry
+# them (Help > About > Licences, `solvecraft-cli licences`).
+copy_docs() {
+  local dest="$1" f
+  for f in README.md LICENSE-MIT LICENSE-APACHE NOTICE THIRD-PARTY-LICENSES.txt; do
+    if [ -f "$ROOT/$f" ]; then cp "$ROOT/$f" "$dest/"; fi
+  done
+}
+
+# The app icon in every size a package needs, drawn by the CLI (no image files are committed):
+# $1 = the solvecraft-cli to run, $2 = output dir. Writes hicolor/<n>x<n>/apps/$APP_ID.png,
+# solvecraft.ico and solvecraft-1024.png.
+make_icons() {
+  local cli="$1" out="$2" s
+  for s in 16 24 32 48 64 128 256 512; do
+    mkdir -p "$out/hicolor/${s}x${s}/apps"
+    "$cli" icon --size "$s" --out "$out/hicolor/${s}x${s}/apps/$APP_ID.png" >/dev/null
+  done
+  "$cli" icon --out "$out/solvecraft.ico" >/dev/null
+  "$cli" icon --size 1024 --out "$out/solvecraft-1024.png" >/dev/null
+}