ci(node): run examples in CI (#1796)

This is done as setup for a PR that will fix the OpenAI dependency
issue.

 * [x] FTS examples
 * [x] Setup mock openai
 * [x] Ran `npm audit fix`
 * [x] sentences embeddings test
 * [x] Double check formatting of docs examples

nodejs/tsconfig.json

@@ -12,7 +12,7 @@
     "experimentalDecorators": true,
     "moduleResolution": "Node"
   },
-  "exclude": ["./dist/*"],
+  "exclude": ["./dist/*", "./examples/*"],
   "typedocOptions": {
     "entryPoints": ["lancedb/index.ts"],
     "out": "../docs/src/javascript/",