✨ (openai) Add tools and functions support (#1167)

Closes #863

Got helped from #1162 for the implementation. Closing it in favor of
this PR.

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **New Features**
- Enhanced `CodeEditor` with additional properties for better form
control and validation.
- Introduced tools and functions in OpenAI integrations documentation
for custom JavaScript execution.
- Added capability to define and use custom JavaScript functions with
the OpenAI assistant.
- Expanded layout metadata options to include various input types and
languages.

- **Improvements**
- Updated the OpenAI actions to support new function execution features.

- **Documentation**
- Added new sections for tools and functions in the OpenAI integrations
guide.

- **Refactor**
- Refactored components and actions to integrate new features and
improve existing functionalities.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

apps/docs/editor/blocks/integrations/openai.mdx

@@ -33,6 +33,18 @@ Then you can give the OpenAI block access to this sequence of messages:
   />
 </Frame>
 
+### Tools
+
+The tools section allows you to add functions that the OpenAI model can execute. Here is an example of a function named `getWeather` that returns 'Sunny and warm' if you ask about the weather of Paris and 'Rainy and cold' if you ask for any other city 😂.
+
+A more useful example would be, of course, to call an API to get the weather of the city the user is asking about.
+
+<Frame>
+  <img src="/images/blocks/integrations/openai/tools.png" alt="OpenAI tools" />
+</Frame>
+
+As you can see, the code block expects the body of the Javascript function. You can use the `return` keyword to return values.
+
 ## Ask assistant
 
 This action allows you to talk with your [OpenAI assistant](https://platform.openai.com/assistants). All you have to do is to provide its ID.
@@ -44,6 +56,10 @@ This action allows you to talk with your [OpenAI assistant](https://platform.ope
   />
 </Frame>
 
+### Functions
+
+If you defined functions in your assistant, you can define the function to execute in the `Functions` section.
+
 ## Create speech
 
 This action allows you to transform a text input into an audio URL that you can reuse in your bot.