Description of changes

This PR introduces an initial proposal to support uv as an alternative to pipenv for installing Python Lambda dependencies.

Why this change?

• Performance: pipenv resolution is often slow in CI/CD and local development.
• Efficiency: uv (built in Rust) offers significantly faster dependency resolution and installation.

Note: This is an early-stage proposal. I am seeking feedback on the implementation approach and collaboration to meet the repository's contribution standards (e.g., error handling, edge cases).

Issue #, if available

N/A

Description of how you validated changes

• Manually verified successful dependency installation in a sample Python Lambda project.
• Observed significant (though currently unquantified) reduction in build times.
• Note: I can provide formal benchmarks if required.

Checklist

• PR description included
• yarn test passes
• Tests are changed or added
• Relevant documentation is changed or added