Add release packaging script

scripts/release.sh

@@ -0,0 +1,42 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+if [[ $# -ne 1 || ! $1 =~ ^[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
+  echo "usage: $0 VERSION" >&2
+  exit 2
+fi
+
+release_version=$1
+release_tag="v${release_version}"
+repo_root=$(git rev-parse --show-toplevel)
+publisher="$HOME/.agents/skills/publish-gitea-release/scripts/gitea-publish-asset.sh"
+release_dir=$(mktemp -d "${TMPDIR:-/tmp}/arrowvortex-wine-release.XXXXXX")
+asset="$release_dir/arrowvortex-wine-${release_tag}-source.tar.gz"
+notes="$release_dir/release-notes.md"
+
+cleanup() {
+  rm -rf "$release_dir"
+}
+trap cleanup EXIT
+
+cd "$repo_root"
+git diff --check
+nix build .
+nix flake check
+
+git archive --format=tar.gz --prefix="arrowvortex-wine-${release_tag}/" HEAD >"$asset"
+
+cat >"$notes" <<EOF
+## File dialog fixed
+
+- The ArrowVortex Wine launcher now uses a fresh Wine-versioned prefix by default.
+- **File → Open** and **Ctrl+O** now show Wine's native file picker on KDE Plasma Wayland.
+- The old unversioned prefix is preserved, and `WINEPREFIX` remains available for custom prefixes.
+EOF
+
+sha256sum "$asset"
+"$publisher" \
+  --tag "$release_tag" \
+  --asset "$asset" \
+  --title "ArrowVortex Wine ${release_tag}" \
+  --body-file "$notes"