chore: import upstream snapshot with attribution

.github/scripts/is_release.sh

@@ -0,0 +1,9 @@
+#!/bin/sh
+
+# This script checks if the current commit contains changesets.
+
+set -eu
+
+CHANGES=$(node -e "require('@changesets/read').default(process.cwd()).then(result => console.log(!!result.length))")
+
+echo "${CHANGES}"

.github/scripts/is_release_for_package.sh

@@ -0,0 +1,15 @@
+#!/bin/sh
+
+# This script checks if the specified package has changesets in the current commit.
+
+set -eu
+
+if [ $# -lt 1 ]; then
+  echo "Error: Package name is required as the first argument." >&2
+  exit 1
+fi
+
+PACKAGE_NAME=$1
+PACKAGE_CHANGES=$(node -e "require('@changesets/read').default(process.cwd()).then(result => console.log(result.flatMap(changeset => changeset.releases.flatMap(release => release.name)).includes('${PACKAGE_NAME}')))")
+
+echo "${PACKAGE_CHANGES}"