chore(deps): upgrade to Hugo v0.161.0 (css.TailwindCSS Node.js sandbox)

Hugo v0.161 dropped the standalone tailwindcss binary; @tailwindcss/cli
npm package is now the only accepted transformer, invoked via
`node --permission` (Node >= 22 required).

- Bump module.hugoVersion.min to 0.161.0 in modules/blox/hugo.yaml;
  add comment explaining why security.node.permissions is left to
  Hugo's built-in defaults
- Bump hugo_version / HUGO_VERSION / devcontainer image tag to 0.161.0
  across all 9 templates (hugoblox.yaml, netlify.toml, devcontainer.json)
- Bump devcontainer base image Node 20 → 22 and default Hugo version
- Add scripts/check-template-deps.mjs to assert every template declares
  tailwindcss + @tailwindcss/cli; wire as pnpm check:template-deps
- Harden CI: new audit-template-deps job gates all build jobs; add
  `require.resolve('@tailwindcss/cli/package.json')` check after each
  pnpm install to catch the exact "binary is not a Node.js script" failure

.github/workflows/devcontainer-image.yml

@@ -14,8 +14,9 @@ on:
 
 env:
   IMAGE_NAME: ghcr.io/hugoblox/hugo-blox-dev
-  DEFAULT_HUGO_VERSION: 0.152.2
-  NODE_VERSION: 20
+  # Hugo >= 0.161.0 requires Node >= 22 for css.TailwindCSS Node permissions.
+  DEFAULT_HUGO_VERSION: 0.161.0
+  NODE_VERSION: 22
   PNPM_VERSION: 10.14.0
 
 jobs: