Add github CI, improve README #2

	# Reference:
	# - https://doc.rust-lang.org/stable/clippy/continuous_integration/github_actions.html
	# - https://github.com/actions/starter-workflows/blob/main/ci/rust.yml
	on: push

	name: Clippy check

	# Make sure CI fails on all warnings, including Clippy lints
	env:
	RUSTFLAGS: "-Dwarnings"
	CARGO_TERM_COLOR: always

	jobs:
	clippy_check:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- name: Build
	run: cargo build --verbose
	- name: Run fmt
	run: cargo fmt
	- name: Run Clippy
	run: cargo clippy --all-targets --all-features
	- name: Run tests
	run: cargo test --verbose

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