feat: add CPU-intensive benchmark functions (count_primes, hash_iterations, sum_of_squares)

perf: switch reqwest from native-tls to rustls for faster pure-Rust TLS compilation in Colab

fix: configure maturin to build with minimal features for fast pip install in Colab

Optimize build time for Colab by making heavy dependencies optional and feature-gating components in sayr-engine and sayr-py

chore: optimize build by feature-gating duckdb and resolve sayr-py build errors

docs: remove build status badge

docs: add comprehensive badges and fix license link

docs: add logo and update license/acknowledgments sections

Add MIT License to the project

fix: add explicit exclude to Cargo.toml to fix publish on CI

fix: remove .venv from git and ignore it to fix cargo publish

fix: correct language detection stats by vendoring non-core dirs

fix: ignore .env files

fix: remove sensitive .env file and add to gitignore

Merge pull request #23 from YASSERRMD/rename-to-sayr-engine