feat(releaseprep): migrate standalone tool into vociferate

script/prepare-release.sh

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+if [[ $# -ne 1 ]]; then
+  echo "usage: $0 <version>" >&2
+  exit 2
+fi
+
+repo_root="$(cd "$(dirname "$0")/.." && pwd)"
+release_date="$(date -u +%F)"
+
+go run ./cmd/releaseprep \
+  --root "$repo_root" \
+  --version "$1" \
+  --date "$release_date" \
+  --version-file internal/releaseprep/version/version.go \
+  --version-pattern 'const String = "([^"]+)"' \
+  --changelog changelog.md