test: add simple test #1049

	name: Git is clean
	on: [push]

	concurrency:
	group: ${{ github.ref }}-git-clean
	cancel-in-progress: ${{ github.ref != 'refs/heads/main' }}

	jobs:
	git-clean:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	with:
	submodules: recursive
	fetch-depth: 0

	- uses: DeterminateSystems/nix-installer-action@main
	- uses: DeterminateSystems/magic-nix-cache-action@main

	# Build metas etc. required to do a correct pointer build.
	- run: ./pointers.sh

	# Format the repo after generating pointers so that the pointer files are
	# formatted too.
	- run: nix develop -c forge fmt

	# Check if the repo is clean after generating pointers and formatting.
	- run: git diff --exit-code

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