Create curl | sh script for hermetic benchmark execution and result submission

Make it trivial for people to contribute benchmark results from their hardware without installing anything permanently.

Create a script that:

• Downloads and extracts Zig and Rust toolchains to temp directory
• Clones the benchmark suite
• Runs benchmarks with --save-results
• Uploads results to a collection endpoint
• Cleans up everything afterwards

Example usage:

curl -sSL https://raw.githubusercontent.com/jadnohra/zig-crypto-bench/main/run.sh | sh

This would maximize hardware coverage by making contribution zero-friction.