Motivation

• Provide a clear, polished top-level README.md that explains the repository purpose: writing Rust functions exposed to Python via PyO3 to accelerate complex Polars DataFrame processing and prepare the project for Conda distribution.
• Explain the primary use case and pain point addressed, namely DFS-style hierarchical DataFrame processing (e.g., aircraft component install/remove chains with unknown hierarchy depth) that benefits from Rust performance.

Description

• Add a new README.md that outlines the repository purpose, core approach (Polars + Rust + PyO3), and Conda packaging intent.
• Document the problem statement and include a concise before/after Polars-style example showing hierarchical evaluation results.
• Include rationale for using Rust+PyO3, tech stack, and suggested next steps such as benchmarks, examples, and test fixtures.

Testing

• Confirmed the new file was created and inspected with nl -ba README.md, which printed the full draft successfully.
• Confirmed repository state and commit with git status --short and git rev-parse --short HEAD, and created a commit via git add README.md && git commit -m "docs: add polished README describing project purpose and use case", all of which succeeded.
• Generated the PR metadata via the internal PR helper, which returned the PR title and body payload successfully.

Codex Task