Add backprojection graphic, change visuals of good/bad bullets #85

	name: Build LaTeX documents

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

	workflow_dispatch:

	# A workflow run is made up of one or more jobs that can run sequentially or in parallel
	jobs:
	build:
	# The type of runner that the job will run on
	runs-on: ubuntu-latest

	steps:
	# Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
	- name: Set up Git repository
	uses: actions/checkout@v4

	with:
	fetch-depth: 0
	- name: Fetch tags
	shell: bash
	run: git fetch --tags -f
	- name: Install XeLaTeX
	shell: bash
	run: sudo apt-get install -y latexmk texlive-xetex texlive-science texlive-lang-german
	- name: Build LaTeX documents
	shell: bash
	run: \|
	mkdir $GITHUB_WORKSPACE/latex-output
	find . -name '*.tex' $ -exec latexmk -synctex=1 -xelatex -interaction=nonstopmode -outdir=$GITHUB_WORKSPACE/latex-output -cd "$PWD"/{} \; -o -print $
	- name: Deploy
	if: ${{ github.event_name == 'push' }}
	env:
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
	run: \|
	TAG="nightly"

	git tag -f "$TAG"
	gh release delete "$TAG" \|\| true
	gh release create -t "Nightly PDF build" -n "This release always contains the PDFs built from the latest .tex source. It is advised to only use the latest versions for actual exams, as old versions might contain factual errors." "$TAG"
	for file in $GITHUB_WORKSPACE/latex-output/*.pdf; do
	echo "Delivering file $file"
	gh release upload "$TAG" "$file" --clobber
	done

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