refactor(monorepo): remove root cmd entrypoints

scripts/test_go_packages.sh

@@ -0,0 +1,31 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+readonly SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+readonly REPO_ROOT="$(cd "${SCRIPT_DIR}/.." && pwd)"
+
+main() {
+  local tested=0
+  local package_dir
+
+  for package_dir in "${REPO_ROOT}"/packages/*; do
+    if [[ ! -d "${package_dir}" || ! -f "${package_dir}/go.mod" ]]; then
+      continue
+    fi
+
+    printf 'testing %s\n' "${package_dir#${REPO_ROOT}/}"
+    (
+      cd "${package_dir}"
+      go test ./...
+    )
+    tested=1
+  done
+
+  if [[ "${tested}" -eq 0 ]]; then
+    printf 'no Go runtime packages found under packages/\n' >&2
+    exit 1
+  fi
+}
+
+main "$@"