add crate level docs for faer-core, impl col_ref/col_mut for Mat #109

	on:
	push:
	branches:
	- main
	pull_request:

	name: Assess Code Quality

	jobs:
	code-quality:
	name: code-quality
	runs-on: ubuntu-latest

	steps:
	- name: Checkout source
	uses: actions/checkout@master

	- name: Install toolchain
	uses: dtolnay/rust-toolchain@master
	with:
	toolchain: nightly
	components: clippy, rustfmt, rust-src, miri

	- name: Formatting check
	run: cargo fmt --all -- --check
	# want to get all quality issues
	continue-on-error: true

	- name: Linting check
	run: cargo clippy --all-targets
	# want to get all quality issues
	continue-on-error: true

	# This step can be uncommented and readded once Miri tests are faster
	# - name: Undefined behavior check
	# run: cargo miri test --release --workspace --exclude faer-bench
	# # want to get all quality issues
	# continue-on-error: true

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