docs(vertexai): steer new users toward google.golang.org/genai (googleapis#12094)

* docs(vertexai): steer new users toward google.golang.org/genai

* chore: add license header to doc.go

Author: muncus

vertexai/README.md

@@ -4,6 +4,10 @@
 
 The Vertex AI Go SDK enables developers to use Google's state-of-the-art 
 generative AI models (like Gemini) to build AI-powered features and applications.
+
+New users are encouraged to use the Google GenAI Go SDK available at
+[google.golang.org/genai](http://pkg.go.dev/google.golang.org/genai)
+
 This SDK supports use cases like:
 - Generate text from text-only input
 - Generate text from text-and-images input (multimodal)

vertexai/doc.go

@@ -17,6 +17,9 @@ limitations under the License.
 /*
 Package vertexai provides a client for interacting with Vertex AI APIs.
 
+New users are encouraged to use the Google GenAI Go SDK available at
+[google.golang.org/genai].
+
 See [cloud.google.com/go/vertexai/genai] for the currently supported
 functionality.
 */

vertexai/genai/client.go

@@ -17,7 +17,6 @@
 
 //go:generate protoveneer -license license.txt config.yaml ../../aiplatform/apiv1beta1/aiplatformpb
 
-// Package genai is a client for the generative VertexAI model.
 package genai
 
 import (

vertexai/genai/doc.go

@@ -0,0 +1,19 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package genai is a client for the generative VertexAI model.
+//
+// New users are encouraged to use the Google GenAI Go SDK available at
+// [google.golang.org/genai]
+package genai