docs(readme): add CI, Rust, license, and commit badges

Author: JohnBasrai

README.md

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 # AWS Lambda Action Filter
 
+[![CI](https://github.com/yourusername/aws-lambda-action-filter/actions/workflows/ci.yml/badge.svg)](https://github.com/yourusername/aws-lambda-action-filter/actions)
+![Rust](https://img.shields.io/badge/rust-1.85.0-blue?logo=rust)
+[![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](LICENSE)
+![Last Commit](https://img.shields.io/github/last-commit/yourusername/aws-lambda-action-filter)
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 This project demonstrates a production-ready AWS Lambda function written in Rust, showcasing the **[Explicit Module Boundary Pattern (EMBP)](embp.md)** for clean architecture and comprehensive integration testing with `cargo-lambda`.
 
 ## ✅ Overview