docs: update README.md with better structure + short credit to Elkem #5

	name: Rhino Test
	on: push
	permissions:
	contents: read
	jobs:
	main:
	name: Run linters and tests
	runs-on: ubuntu-22.04
	steps:
	- name: Checkout repo
	uses: actions/checkout@v4

	- name: Setup system dependencies
	run: \|
	packages=(
	# List each package on a separate line.
	)
	sudo apt-get update
	sudo apt-get install --yes "${packages[@]}"

	- name: Setup R
	uses: r-lib/actions/setup-r@v2
	with:
	r-version: renv

	- name: Setup R dependencies
	uses: r-lib/actions/setup-renv@v2

	- name: Setup Node
	uses: actions/setup-node@v3
	with:
	node-version: 20

	- name: Lint R
	if: always()
	shell: Rscript {0}
	run: rhino::lint_r()

	- name: Lint JavaScript
	if: always()
	shell: Rscript {0}
	run: rhino::lint_js()

	- name: Lint Sass
	if: always()
	shell: Rscript {0}
	run: rhino::lint_sass()

	- name: Build JavaScript
	if: always()
	shell: Rscript {0}
	run: rhino::build_js()

	- name: Build Sass
	if: always()
	shell: Rscript {0}
	run: rhino::build_sass()

	- name: Run R unit tests
	if: always()
	shell: Rscript {0}
	run: rhino::test_r()

	- name: Run Cypress end-to-end tests
	if: always()
	uses: cypress-io/github-action@v6
	with:
	working-directory: .rhino # Created by earlier commands which use Node.js
	start: npm run run-app
	project: ../tests
	wait-on: 'http://localhost:3333/'
	wait-on-timeout: 60

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