docs(website): redirect old automation-templates URL to automation-blueprints

The Automation Blueprints rebrand (#44470) renamed the guide page from
guides/automation-templates to guides/automation-blueprints, leaving the
old URL 404ing. The site deploys to static hosting, so server-side
redirects aren't available.

Add @docusaurus/plugin-client-redirects (pinned 3.9.2, same as the other
Docusaurus packages) and a redirect entry for the old slug. The plugin
emits a static HTML page at the old path that meta-refresh/JS-redirects
to the new page, preserving query string and hash, with a canonical link
for SEO. Localized routes are handled automatically (zh-Hans verified).

website/package-lock.json

@@ -9,6 +9,7 @@
       "version": "0.0.0",
       "dependencies": {
         "@docusaurus/core": "3.9.2",
+        "@docusaurus/plugin-client-redirects": "3.9.2",
         "@docusaurus/preset-classic": "3.9.2",
         "@docusaurus/theme-mermaid": "^3.9.2",
         "@easyops-cn/docusaurus-search-local": "^0.55.1",
@@ -3609,6 +3610,30 @@
         "react-dom": "*"
       }
     },
+    "node_modules/@docusaurus/plugin-client-redirects": {
+      "version": "3.9.2",
+      "resolved": "https://registry.npmjs.org/@docusaurus/plugin-client-redirects/-/plugin-client-redirects-3.9.2.tgz",
+      "integrity": "sha512-lUgMArI9vyOYMzLRBUILcg9vcPTCyyI2aiuXq/4npcMVqOr6GfmwtmBYWSbNMlIUM0147smm4WhpXD0KFboffw==",
+      "license": "MIT",
+      "dependencies": {
+        "@docusaurus/core": "3.9.2",
+        "@docusaurus/logger": "3.9.2",
+        "@docusaurus/utils": "3.9.2",
+        "@docusaurus/utils-common": "3.9.2",
+        "@docusaurus/utils-validation": "3.9.2",
+        "eta": "^2.2.0",
+        "fs-extra": "^11.1.1",
+        "lodash": "^4.17.21",
+        "tslib": "^2.6.0"
+      },
+      "engines": {
+        "node": ">=20.0"
+      },
+      "peerDependencies": {
+        "react": "^18.0.0 || ^19.0.0",
+        "react-dom": "^18.0.0 || ^19.0.0"
+      }
+    },
     "node_modules/@docusaurus/plugin-content-blog": {
       "version": "3.9.2",
       "resolved": "https://registry.npmjs.org/@docusaurus/plugin-content-blog/-/plugin-content-blog-3.9.2.tgz",