[FEATURE] Get rid of lemon dependency. #184

	name: Documentation

	on:
	push:
	branches:
	- 'main'
	pull_request:
	types:
	- unlabeled
	workflow_dispatch:

	concurrency:
	group: documentation-${{ github.event.pull_request.number \|\| github.ref }}
	cancel-in-progress: ${{ github.event_name != 'push' }}

	env:
	TZ: Europe/Berlin

	defaults:
	run:
	shell: bash -Eexuo pipefail {0}

	jobs:
	build:
	name: Documentation
	runs-on: ubuntu-22.04
	timeout-minutes: 120
	if: github.repository_owner == 'seqan' \|\| github.event_name == 'workflow_dispatch' \|\| github.event.label.name == 'lint'
	steps:
	- name: Checkout
	uses: actions/checkout@v3
	with:
	fetch-depth: 1
	submodules: true

	- name: Install CMake
	uses: seqan/actions/setup-cmake@main
	with:
	cmake: 3.16.9

	- name: Install Doxygen
	uses: seqan/actions/setup-doxygen@main
	with:
	doxygen: 1.9.6

	- name: Configure tests
	run: \|
	mkdir build
	cd build
	cmake ../test/documentation
	make -j2 download-cppreference-doxygen-web-tag

	- name: Run tests
	run: \|
	cd build
	ctest . -j2 --output-on-failure

Provide feedback