chore: integrate ruff and mypy for CI/CD modernization

[Jitterx69]

Summary

This PR modernizes the project's CI/CD pipeline by integrating ruff for high-performance linting and mypy for static type checking. It also includes an initial refactor of the core awscli/clidriver.py module to demonstrate these improvements, resolving legacy formatting issues and adding strict type hints.

Key Changes

• CI/CD Pipeline: Updated scripts/ci/run-check to enforce linting (ruff) and type safety (mypy).
• Dependencies: Added ruff and mypy to requirements-check.txt.
• Configuration: Added a safe [tool.mypy] configuration to pyproject.toml that allows for incremental adoption (follow_imports = "silent").
• Refactoring (awscli/clidriver.py):
  • Replaced legacy % string formatting with modern f-strings.
  • Added return type annotations to critical entry points: main(), create_clidriver(), and CLIDriver.main().
  • Fixed all strict linting violations.

Motivation

To improve long-term code maintainability and prevent type-related runtime errors. Use of modern tooling (ruff) ensures these checks remain fast, while mypy integration lays the groundwork for a fully typed codebase.

Testing

• Static Analysis: ruff and mypy checks pass with 0 errors on the modified files.
• Unit Tests: Ran tests/unit/test_clidriver.py locally; all 54 tests passed, ensuring no functional regressions.