Add basic repository structure (#2) #3

	# TODO: Setup mdbook
	# name: linkcheck
	#
	# on:
	# push:
	# branches:
	# - unstable
	# pull_request:
	# paths:
	# - 'book/**'
	# merge_group:
	#
	# concurrency:
	# group: ${{ github.workflow }}-${{ github.ref }}
	# cancel-in-progress: true
	#
	# jobs:
	# linkcheck:
	# name: Check broken links
	# runs-on: ubuntu-latest
	#
	# steps:
	# - name: Checkout code
	# uses: actions/checkout@v4
	#
	# - name: Run mdbook server
	# run: \|
	# docker run -v ${{ github.workspace }}/book:/book --name book -p 3000:3000 -d peaceiris/mdbook:latest serve --hostname 0.0.0.0
	# sleep 5
	#
	# - name: Print logs
	# run: docker logs book
	#
	# - name: Run linkcheck
	# run: \|
	# curl -sL https://github.com/filiph/linkcheck/releases/download/3.0.0/linkcheck-3.0.0-linux-x64.tar.gz \| tar xvzf - linkcheck/linkcheck --strip 1
	# ./linkcheck localhost:3000 -d

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