Add link to printable versions in README #17

	name: Check Changed Files and Build Black and White PDFs

	on:
	push:
	branches:
	- main

	jobs:
	detect_changes_and_build_bw:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v4

	- name: Get changed files
	id: changed-files
	uses: tj-actions/changed-files@v44
	with:
	since_last_remote_commit: true

	- name: List all changed files
	env:
	ALL_CHANGED_FILES: ${{ steps.changed-files.outputs.all_changed_files }}
	run: \|
	for file in ${ALL_CHANGED_FILES}; do
	echo "$file was changed"
	done

	- name: Install dependencies
	run: npm install

	- name: Run JavaScript code to build black and white PDFs
	run: \|
	npm run build-bw ${{ steps.changed-files.outputs.all_changed_files }}

	- name: Temporarily move untracked files
	run: \|
	mkdir -p temp_untracked_files
	mv $(git ls-files --others --exclude-standard) temp_untracked_files/

	- name: Checkout black-and-white branch
	run: \|
	git fetch origin
	git checkout black-and-white
	git pull origin black-and-white

	- name: Move untracked files back
	run: \|
	mv temp_untracked_files/* .
	rmdir temp_untracked_files

	- name: Commit and Push Changes to black-and-white branch
	run: \|
	git config --local user.email "[email protected]"
	git config --local user.name "GitHub Actions"
	git add .
	git commit -m "Automated build: update changed black and white PDFs"
	git push origin black-and-white

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