feat: Add Google Cloud Text-to-Speech Tool (#12572)

- Add Tool for [Google Cloud
Text-to-Speech](https://cloud.google.com/text-to-speech)
- Follows similar structure to [Eleven Labs
Text2Speech](https://python.langchain.com/docs/integrations/tools/eleven_labs_tts)

---------

Co-authored-by: Bagatur <baskaryan@gmail.com>

docs/docs/integrations/tools/google_cloud_texttospeech.ipynb

@@ -0,0 +1,94 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "a991a6f8-1897-4f49-a191-ae3bdaeda856",
+   "metadata": {},
+   "source": [
+    "# Google Cloud Text-to-Speech\n",
+    "\n",
+    "This notebook shows how to interact with the `Google Cloud Text-to-Speech API` to achieve speech synthesis capabilities."
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "9eeb311e-e1bd-4959-8536-4d267f302eb3",
+   "metadata": {},
+   "source": [
+    "First, you need to set up an Google Cloud project. You can follow the instructions [here](https://cloud.google.com/text-to-speech/docs/before-you-begin)."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "id": "0a309c0e-5310-4eaa-8af9-bcbc252e45da",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# !pip install google-cloud-text-to-speech"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "434b2454-2bff-484d-822c-4026a9dc1383",
+   "metadata": {},
+   "source": [
+    "## Usage"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "2f57a647-9214-4562-a8cf-f263a15d1f40",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from langchain.tools import GoogleCloudTextToSpeechTool\n",
+    "\n",
+    "text_to_speak = \"Hello world!\"\n",
+    "\n",
+    "tts = GoogleCloudTextToSpeechTool()\n",
+    "tts.name"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "d4613fed-66f0-47c6-be50-7e7670654427",
+   "metadata": {},
+   "source": [
+    "We can generate audio, save it to the temporary file and then play it."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 7,
+   "id": "f1984844-aa75-4f83-9d42-1c8052d87cc0",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "speech_file = tts.run(text_to_speak)"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3 (ipykernel)",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.11.0"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}