Setup `black` and `isort` for using pre-commit

[ParagEkbote]

Why This Is Important

• Consistency: Ensures all contributors follow the same code style and import ordering.
• Quality: Improves readability and maintainability of the codebase.
• Reliability: Prevents style-related issues from slipping into production.

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Tasks

• Add pre-commit configuration file (.pre-commit-config.yaml) to the repository.
• Configure hooks for black (code formatter) and isort (import sorter).
• Install pre-commit in the development environment (pip install pre-commit).
• Run pre-commit install to enable hooks locally.
• Test by committing code to verify that formatting and import sorting are applied automatically.
• Update documentation (README or contributing guide) to explain usage.

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Acceptance Criteria

• .pre-commit-config.yaml exists with black and isort hooks configured.
• Developers can run pre-commit install and see hooks applied on commit.
• Code is automatically formatted with black and imports sorted with isort.
• Documentation updated to guide contributors on setup and usage.