docs: Update GPT4 documentation with available tools and use cases (#2580)

Updates the GPT-4 documentation and the `GPT4Brain` class to include
detailed information about the tools available for GPT4Brain and their
use cases.

- **Documentation (`docs/brains/gpt4.mdx`):**
- Adds a new section titled "Tools Available for GPT4Brain" that
describes specific tools: WebSearchTool, ImageGeneratorTool,
URLReaderTool, and EmailSenderTool.
- Provides use cases for each tool, demonstrating how they can be
utilized within GPT4Brain for various scenarios, such as generating
images, reading content from URLs, and sending emails.

- **Code (`backend/modules/brain/integrations/GPT4/Brain.py`):**
- Updates the class documentation to include information about the tools
available for GPT4Brain and outlines use cases for WebSearchTool,
ImageGeneratorTool, URLReaderTool, and EmailSenderTool.
- Maintains the existing functionality of the `GPT4Brain` class,
ensuring compatibility with the newly documented tools and use cases.


---

For more details, open the [Copilot Workspace
session](https://copilot-workspace.githubnext.com/QuivrHQ/quivr?shareId=2c2c1666-e5fb-4a06-bb08-ca967f4fe276).

backend/modules/brain/integrations/GPT4/Brain.py

@@ -35,11 +35,20 @@ chat_service = ChatService()
 
 
 class GPT4Brain(KnowledgeBrainQA):
-    """This is the Notion brain class. it is a KnowledgeBrainQA has the data is stored locally.
-    It is going to call the Data Store internally to get the data.
-
-    Args:
-        KnowledgeBrainQA (_type_): A brain that store the knowledge internaly
+    """
+    GPT4Brain integrates with GPT-4 to provide real-time answers and supports various tools to enhance its capabilities.
+    
+    Available Tools:
+    - WebSearchTool: Performs web searches to find relevant information.
+    - ImageGeneratorTool: Generates images based on textual descriptions.
+    - URLReaderTool: Reads and summarizes content from URLs.
+    - EmailSenderTool: Sends emails with specified content.
+    
+    Use Cases:
+    - WebSearchTool can be used to find the latest news articles on a specific topic or to gather information from various websites.
+    - ImageGeneratorTool is useful for creating visual content based on textual prompts, such as generating a company logo based on a description.
+    - URLReaderTool can be used to summarize articles or web pages, making it easier to quickly understand the content without reading the entire text.
+    - EmailSenderTool enables automated email sending, such as sending a summary of a meeting's minutes to all participants.
     """
 
     tools: Optional[List[BaseTool]] = None

docs/brains/gpt4.mdx

@@ -43,4 +43,20 @@ To add a GPT-4 Brain to Quivr, you need to perform the following steps:
     </Step>
 </Steps>
 
+## Tools Available for GPT4Brain
 
+GPT4Brain is equipped with a variety of tools to enhance its capabilities and provide more comprehensive answers. These tools include:
+
+- **WebSearchTool**: Allows GPT4Brain to perform web searches to find relevant information.
+- **ImageGeneratorTool**: Enables GPT4Brain to generate images based on textual descriptions.
+- **URLReaderTool**: Allows GPT4Brain to read and summarize content from URLs.
+- **EmailSenderTool**: Enables GPT4Brain to send emails with specified content.
+
+### Use Cases
+
+Here are some use cases demonstrating how each tool can be utilized within GPT4Brain:
+
+- **WebSearchTool**: Can be used to find the latest news articles on a specific topic or to gather information from various websites.
+- **ImageGeneratorTool**: Useful for creating visual content based on textual prompts, such as generating a company logo based on a description.
+- **URLReaderTool**: Can be used to summarize articles or web pages, making it easier to quickly understand the content without reading the entire text.
+- **EmailSenderTool**: Enables automated email sending, such as sending a summary of a meeting's minutes to all participants.