refactor(ci): organize workflow scripts and gate publish on main

scripts/github/publish-containers/checkout-workflow-run-commit.sh

@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+WORKFLOW_RUN_SHA="${WORKFLOW_RUN_SHA:?WORKFLOW_RUN_SHA must be set}"
+
+git checkout -f "${WORKFLOW_RUN_SHA}"
+git fetch --tags --force
+git tag --list 'stable' 'v*' --sort=version:refname | tail -n 20