Reimplement doxygen target & workflow #1

	name: Documentation

	on:
	push:
	branches:
	- master
	paths-ignore:
	- ".github/**"
	- "cmake/**"
	- "examples/**"
	- "tests/**"

	jobs:
	build:
	name: Build and publish documentation
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v3

	- name: Install dependencies
	run: \|
	sudo apt install doxygen
	sudo apt install graphviz

	- name: Generate docs
	run: \|
	cmake -S . -B building_docs
	cmake --build building_docs --target docs

	- name: Publish
	uses: peaceiris/actions-gh-pages@v3
	with:
	github_token: ${{ secrets.GITHUB_TOKEN }}
	publish_dir: ./docs/html

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