Add code formatters

Description

Add minimal code formatting tools to enforce a consistent style across the codebase. Specifically:

• Integrate black — a Python code formatter for enforcing uniform formatting.
• Integrate isort — for automatically sorting and grouping imports.

Acceptance Criteria

• pyproject.toml includes configuration for both black and isort
• Existing code is reformatted (if necessary) to comply with formatter rules
• Add formatters check to existing CI pipeline

Notes

• Consider adding a pre-commit hook later (optional)