docs: adding langchain_google_community to the docs (#20665)

Thank you for contributing to LangChain!

- [ ] **PR title**: "docs: step1. adjusting langchain_community ->
langchain_google_community"


- [ ] 
- **Description:** step1. adjusting langchain_community ->
langchain_google_community

docs/docs/integrations/platforms/google.mdx

@@ -163,16 +163,16 @@ from langchain_google_alloydb_pg import AlloyDBEngine, AlloyDBLoader
 
 > [Google Cloud BigQuery](https://cloud.google.com/bigquery) is a serverless and cost-effective enterprise data warehouse that works across clouds and scales with your data in Google Cloud.
 
-We need to install `google-cloud-bigquery` python package.
+We need to install `langchain-google-community` with Big Query dependencies:
 
 ```bash
-pip install google-cloud-bigquery
+pip install langchain-google-community[bigquery]
 ```
 
 See a [usage example](/docs/integrations/document_loaders/google_bigquery).
 
 ```python
-from langchain_community.document_loaders import BigQueryLoader
+from langchain_google_community import BigQueryLoader
 ```
 
 ### Bigtable
@@ -239,23 +239,23 @@ from langchain_google_cloud_sql_pg import PostgresEngine, PostgresLoader
 
 >[Cloud Storage](https://en.wikipedia.org/wiki/Google_Cloud_Storage) is a managed service for storing unstructured data in Google Cloud.
 
-We need to install `google-cloud-storage` python package.
+We need to install `langchain-google-community` with Google Cloud Storage dependencies.
 
 ```bash
-pip install google-cloud-storage
+pip install langchain-google-community[gcs]
 ```
 
 There are two loaders for the `Google Cloud Storage`: the `Directory` and the `File` loaders.
 
 See a [usage example](/docs/integrations/document_loaders/google_cloud_storage_directory).
 
 ```python
-from langchain_community.document_loaders import GCSDirectoryLoader
+from langchain_google_community import GCSDirectoryLoader
 ```
 See a [usage example](/docs/integrations/document_loaders/google_cloud_storage_file).
 
 ```python
-from langchain_community.document_loaders import GCSFileLoader
+from langchain_google_community import GCSFileLoader
 ```
 
 ### El Carro for Oracle Workloads
@@ -280,16 +280,16 @@ from langchain_google_el_carro import ElCarroLoader
 
 Currently, only `Google Docs` are supported.
 
-We need to install several python packages.
+We need to install `langchain-google-community` with Google Drive dependencies.
 
 ```bash
-pip install google-api-python-client google-auth-httplib2 google-auth-oauthlib
+pip install langchain-google-community[drive]
 ```
 
 See a [usage example and authorization instructions](/docs/integrations/document_loaders/google_drive).
 
 ```python
-from langchain_community.document_loaders import GoogleDriveLoader
+from langchain_google_community import GoogleDriveLoader
 ```
 
 ### Firestore (Native Mode)
@@ -359,16 +359,16 @@ from langchain_google_spanner import SpannerLoader
 
 This document loader transcribes audio files and outputs the text results as Documents.
 
-First, we need to install the python package.
+First, we need to install `langchain-google-community` with speech-to-text dependencies.
 
 ```bash
-pip install google-cloud-speech
+pip install langchain-google-community[speech]
 ```
 
 See a [usage example and authorization instructions](/docs/integrations/document_loaders/google_speech_to_text).
 
 ```python
-from langchain_community.document_loaders import GoogleSpeechToTextLoader
+from langchain_google_community import SpeechToTextLoader
 ```
 
 ## Document Transformers
@@ -386,15 +386,14 @@ We can get it either programmatically or copy from the `Prediction endpoint` sec
 tab in the Google Cloud Console.
 
 ```bash
-pip install google-cloud-documentai
-pip install google-cloud-documentai-toolbox
+pip install langchain-google-community[docai]
 ```
 
 See a [usage example](/docs/integrations/document_transformers/google_docai).
 
 ```python
-from langchain_community.document_loaders.blob_loaders import Blob
-from langchain_community.document_loaders.parsers import DocAIParser
+from langchain_core.document_loaders.blob_loaders import Blob
+from langchain_google_community import DocAIParser
 ```
 
 ### Google Translate
@@ -405,18 +404,16 @@ from langchain_community.document_loaders.parsers import DocAIParser
 
 The `GoogleTranslateTransformer` allows you to translate text and HTML with the [Google Cloud Translation API](https://cloud.google.com/translate).
 
-To use it, you should have the `google-cloud-translate` python package installed, and a Google Cloud project with the [Translation API enabled](https://cloud.google.com/translate/docs/setup). This transformer uses the [Advanced edition (v3)](https://cloud.google.com/translate/docs/intro-to-v3).
-
-First, we need to install the python package.
+First, we need to install the `langchain-google-community` with translate dependencies.
 
 ```bash
-pip install google-cloud-translate
+pip install langchain-google-community[translate]
 ```
 
 See a [usage example and authorization instructions](/docs/integrations/document_transformers/google_translate).
 
 ```python
-from langchain_community.document_transformers import GoogleTranslateTransformer
+from langchain_google_community import GoogleTranslateTransformer
 ```
 
 ## Vector Stores
@@ -646,7 +643,7 @@ pip install google-cloud-text-to-speech
 See a [usage example and authorization instructions](/docs/integrations/tools/google_cloud_texttospeech).
 
 ```python
-from langchain.tools import GoogleCloudTextToSpeechTool
+from langchain_google_community import TextToSpeechTool
 ```
 
 ### Google Drive
@@ -739,7 +736,7 @@ from langchain_community.utilities.google_scholar import GoogleScholarAPIWrapper
 `GOOGLE_API_KEY` and `GOOGLE_CSE_ID` respectively.
 
 ```python
-from langchain_community.utilities import GoogleSearchAPIWrapper
+from langchain_google_community import GoogleSearchAPIWrapper
 ```
 
 For a more detailed walkthrough of this wrapper, see [this notebook](/docs/integrations/tools/google_search).
@@ -773,16 +770,16 @@ from langchain_community.utilities.google_trends import GoogleTrendsAPIWrapper
 > [Google Gmail](https://en.wikipedia.org/wiki/Gmail) is a free email service provided by Google.
 This toolkit works with emails through the `Gmail API`.
 
-We need to install several python packages.
+We need to install `langchain-google-community` with required dependencies:
 
 ```bash
-pip install google-api-python-client google-auth-oauthlib google-auth-httplib2
+pip install langchain-google-community[gmail]
 ```
 
 See a [usage example and authorization instructions](/docs/integrations/toolkits/gmail).
 
 ```python
-from langchain_community.agent_toolkits import GmailToolkit
+from langchain_google_community import GmailToolkit
 ```
 
 ## Memory
@@ -948,16 +945,16 @@ from langchain_google_el_carro import ElCarroChatMessageHistory
 > [Gmail](https://en.wikipedia.org/wiki/Gmail) is a free email service provided by Google.
 This loader works with emails through the `Gmail API`.
 
-We need to install several python packages.
+We need to install `langchain-google-community` with underlying dependencies.
 
 ```bash
-pip install google-api-python-client google-auth-oauthlib google-auth-httplib2
+pip install langchain-google-community[gmail]
 ```
 
 See a [usage example and authorization instructions](/docs/integrations/chat_loaders/gmail).
 
 ```python
-from langchain_community.chat_loaders.gmail import GMailLoader
+from langchain_google_community import GMailLoader
 ```
 
 ## 3rd Party Integrations