Add doc comments & tests. Some refactoring #105

	name: Rust

	on:
	push:
	branches: [ main ]
	pull_request:
	branches: [ main ]

	env:
	CARGO_TERM_COLOR: always

	jobs:
	build:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v3
	- name: Build
	run: \|
	cargo build --verbose
	cargo build --verbose --features simd
	- name: Run tests
	run: \|
	cargo test --verbose
	cargo test --verbose --features simd

	clippy_check:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v3
	- run: rustup component add clippy
	- uses: actions-rs/clippy-check@v1
	with:
	token: ${{ secrets.GITHUB_TOKEN }}
	args: --all-features

	benchmark:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v3
	- name: Install nightly
	run: rustup toolchain install nightly
	- name: Benchmark
	run: cargo +nightly bench --features simd perft::bench_perft_5 \| tee bench-output.txt
	- name: Store benchmark result
	uses: benchmark-action/github-action-benchmark@v1
	with:
	tool: cargo
	output-file-path: bench-output.txt
	auto-push: false
	- name: Push benchmark result
	run: git push 'https://github-actions:${{ secrets.GITHUB_TOKEN }}@github.com/sugyan/yasai.git' gh-pages:gh-pages
	if: github.event_name != 'pull_request'

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