doc

Use doxygen and gcc, no need for clang #5

	name: doc
	on:
	workflow_dispatch:
	workflow_call:
	push:
	branches:
	- release-v*

	concurrency:
	group: doc-${{github.ref}}-${{github.event.pull_request.number \|\| github.run_number}}-${{github.workflow}}
	cancel-in-progress: true

	jobs:
	user:
	name: user
	runs-on: ubuntu-latest
	steps:
	- name: Install dependencies
	run: \|
	sudo apt-get -y update
	sudo apt-get -y install \
	cmake graphviz ninja-build doxygen gcc
	- uses: actions/setup-python@v4
	with:
	python-version: '3.10'
	- name: Check out Celeritas
	uses: actions/checkout@v4
	with:
	fetch-depth: 255
	fetch-tags: true
	- name: Install Python packages
	run: \|
	pip install --upgrade pip
	pip install -r scripts/requirements.txt
	- name: Build Celeritas documentation
	run: \|
	mkdir build && cd build
	cmake -DCELERITAS_BUILD_DOCS=ON -GNinja ..
	ninja doc
	- name: Upload pages artifacts
	id: upload-pages
	uses: actions/upload-pages-artifact@v2
	with:
	path: build/doc/html
	- name: Deploy pages
	id: deploy-pages
	uses: actions/deploy-pages@v2

Provide feedback