chore: type hint issue

[nautics889]

Minor fixes for type hints: List[CustomType] type doesn't seem to be an appropriate type when passing multiple arguments to a function.
See the screenshot below:

Instead, when covering asterisk arguments with type hints, i suggest to use Optional[CustomType] (Optional means that the function de-facto can accept 0 arguments).

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Further notation: the Unpack type can appear in 3.12 according to PEP-0692, exactly for such cases.

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• (chore): inappropriate type for multiple function arguments (asterisk notation)
• (docs): update docstring accordingly

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• Tests added and passed if fixing a bug or adding a new feature
• All code checks passed.

Summary by CodeRabbit

• Refactor: Updated the add_middlewares method in the PandasAI class across multiple modules (code_manager.py, smart_dataframe/__init__.py, and smart_datalake/__init__.py). The method now accepts an optional Middleware type instead of a list of Middleware. This change enhances flexibility when adding middlewares to the PandasAI instance, allowing users to add multiple middlewares as separate arguments rather than passing them as a list.

[coderabbitai]

Walkthrough

The changes across the files primarily focus on enhancing the flexibility of the add_middlewares method in the PandasAI class. The method's signature has been updated to accept an optional Middleware type instead of a list, allowing for the addition of zero or more middlewares as arguments.

Changes

File Path	Summary
.../helpers/code_manager.py	Updated add_middlewares method to accept Optional[Middleware] instead of List[Middleware].
.../smart_dataframe/init.py	Modified add_middlewares method to accept an optional Middleware type, increasing flexibility.
.../smart_datalake/init.py	Changed add_middlewares method to accept multiple Middleware objects as separate arguments.

🐇💻

In the land of code where the shadows lie,

A rabbit hopped and tweaked a line.

No longer a list, but options galore,

Middleware now flexes more and more.

With each hop and skip, the code does grow,

Into a masterpiece, a radiant glow. 🌟

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Review Status

Actionable comments generated: 3

Commits

Files that changed from the base of the PR and between 9e6a71a and ad7670c commits.

Files selected for processing (3)

• pandasai/helpers/code_manager.py (1 hunks)
• pandasai/smart_dataframe/init.py (1 hunks)
• pandasai/smart_datalake/init.py (1 hunks)

Additional comments (Suppressed): 2

pandasai/smart_datalake/__init__.py (1)

• 172-179: The function signature has been updated to accept an optional Middleware type instead of a list of Middleware. This change allows the method to accept zero or more middlewares as arguments, enhancing flexibility. Ensure that all calls to this function throughout the codebase have been updated to match the new signature.

pandasai/helpers/code_manager.py (1)

• 46-47: