Add a scaffold `preview_can_change_state` option that determines beha… #1433

	---
	name: Unit Tests

	on:
	push:
	pull_request:

	jobs:
	unit-tests:
	runs-on: ubuntu-24.04
	steps:
	- name: Checkout PG code
	uses: actions/checkout@v4

	- name: Install Ubuntu dependencies
	run: \|
	sudo apt-get update
	sudo apt-get install -y --no-install-recommends --no-install-suggests \
	cpanminus \
	dvipng \
	dvisvgm \
	imagemagick \
	libclass-accessor-perl \
	libclass-tiny-perl \
	libdbi-perl \
	libencode-perl \
	libgd-perl \
	libhtml-parser-perl \
	libjson-perl \
	libjson-xs-perl \
	liblocale-maketext-lexicon-perl \
	libmojolicious-perl \
	libtest2-suite-perl \
	libtie-ixhash-perl \
	libuuid-tiny-perl \
	libyaml-libyaml-perl \
	pdf2svg \
	texlive \
	texlive-latex-extra \
	texlive-latex-recommended \
	texlive-plain-generic

	- name: Install Perl dependencies
	run: cpanm --sudo -fi --notest HTML::TagParser

	- name: Run Perl unit tests
	run: \|
	export PG_ROOT=`pwd`
	prove -r t

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