feat: add build:test script and improve documentation code blocks

- Added a new script `build:test` to generate test cases from documentation code examples.
- Enhanced documentation files by ensuring proper code block formatting and adding missing closing backticks.
- Updated various markdown files to include new code blocks and fixed formatting issues.

package.json

@@ -31,6 +31,7 @@
     "build:llm": "node ./scripts/build-llm.js",
     "build:docs": "node ./scripts/build-docs.js",
     "build:i18n": "node ./scripts/build-i18n.js",
+    "build:test": "node ./scripts/build-test.js",
     "trans:docs": "node ./scripts/trans-docs.js",
     "create:plugin": "node ./scripts/plugin/create.js",
     "dev": "npx cross-env NODE_ENV=development node ./scripts/dev.js",