added google-vertexai provider page

docs/docs/integrations/providers/google-vertexai.ipynb

@@ -0,0 +1,25 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# **Google Vertex AI**\n",
+    "\n",
+    "> **What is `Google Vertex AI`?**\n",
+    "\n",
+    "- Google Vertex AI is a **fully-managed AI platform** that enables developers to build, test, and deploy generative AI models quickly and efficiently.\n",
+    "- It provides access to advanced models like Gemini and tools to integrate AI seamlessly into enterprise applications.\n",
+    "\n",
+    "> Get started with Google Vertex AI by visiting [their website](https://cloud.google.com/vertex-ai)."
+   ]
+  }
+ ],
+ "metadata": {
+  "language_info": {
+   "name": "python"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2
+}