Add a benchmark example using the blake2b

[mohanson]

No description provided.

[Copilot]

Pull Request Overview

This PR adds a new benchmark example that demonstrates the performance characteristics of the blake2b hash algorithm using the pywasm WebAssembly interpreter. The example creates a Rust-based WebAssembly module that repeatedly executes the blake2b hash function and includes a Python script to measure execution time.

• Creates a new Rust crate that implements a benchmarking function using blake2b hashing
• Adds a Python benchmark runner that loads and executes the WebAssembly module
• Updates documentation to include the new benchmark example

Reviewed Changes

Copilot reviewed 6 out of 9 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
example/blake2b_iter/src/lib.rs	Implements the blake2b benchmarking function in Rust
example/blake2b_iter/Cargo.toml	Rust project configuration for WebAssembly compilation
example/blake2b_iter/.gitignore	Git ignore file for the Rust project
example/blake2b_iter/.cargo/config.toml	Cargo configuration targeting WebAssembly
example/blake2b_iter.py	Python benchmark runner script
README.md	Documentation update adding the new benchmark example

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[Copilot]

The unsafe attribute syntax is incorrect. The proper syntax for preventing name mangling is #[no_mangle] without the unsafe wrapper.

Suggested change

	#[unsafe(no_mangle)]
	#[no_mangle]