docs: Add example of magic state distillation #41

	name: Brat CI

	on:
	push:
	branches: [ main ]
	pull_request:
	branches: [ main ]

	jobs:
	build:

	runs-on: ubuntu-latest

	defaults:
	run:
	working-directory: brat/

	steps:
	- uses: actions/checkout@v4
	- uses: haskell-actions/setup@v2
	with:
	ghc-version: '9.6.4'
	cabal-version: '3.4'
	enable-stack: true

	# from: https://raehik.github.io/2021/03/01/caching-stack-and-cabal-haskell-builds-on-github-actions.html
	- uses: actions/cache@v4
	with:
	path: \|
	~/.stack
	.stack-work
	~/.cargo
	# best effort for cache: tie it to Stack resolver and package config
	key: ${{ runner.os }}-stack-${{ hashFiles('brat/stack.yaml',
	'hugr_validator/Cargo.toml',
	'hugr_extension/Cargo.toml') }}
	restore-keys: \|
	${{ runner.os }}-stack
	save-always: true

	- name: Install dependencies
	run: stack build --only-dependencies
	- name: Build
	run: stack build --ghc-options "-O0"
	- name: Build stack tests
	run: stack test --no-run-tests --no-run-benchmarks --ghc-options "-O0"
	- name: Run stack tests
	run: stack test --ta --hide-successes

	# Validate the hugr outputs
	- name: Check for hugr_validator
	id: cached_validator
	run: \|
	if [ -f ~/.cargo/bin/hugr_validator ]; then
	echo "out=true" >> $GITHUB_OUTPUT
	else
	echo "We need to build hugr_validator"
	echo "out=false" >> $GITHUB_OUTPUT
	fi

	- name: Install rust
	if: ${{ steps.cached_validator.outputs.out != 'true' }}
	uses: dtolnay/rust-toolchain@stable
	- name: Install hugr_validator
	if: ${{ steps.cached_validator.outputs.out != 'true' }}
	run: cargo install --path ../hugr_validator
	- name: Validate compilation output
	run: tools/validate.sh

Provide feedback