Replace `cleanup` script and Win32-specific function with `std::filesystem` #6138

	name: Check formatting

	concurrency:
	# Don't cancel on master, creating a PR when a push workflow is already going will cancel the push workflow in favour of the PR workflow
	group: ${{ github.workflow }}-${{ github.ref == 'refs/heads/master' && github.run_id \|\| github.event.number && github.head_ref \|\| github.ref_name }}
	cancel-in-progress: true

	on:
	merge_group:
	push:
	branches:
	- release/**
	pull_request:
	branches:
	- master
	- release/**

	jobs:
	all:
	name: C/C++, CMake and Python
	runs-on: ubuntu-22.04
	timeout-minutes: 5
	steps:
	- uses: actions/checkout@v4
	- name: Update submodule
	working-directory: ${{runner.workspace}}/nrn
	run: git submodule update --init external/coding-conventions
	- name: Check formatting
	working-directory: ${{runner.workspace}}/nrn
	run: \|
	external/coding-conventions/bin/format

	modified_files=$(git diff --name-only)
	if [ -n "$modified_files" ]; then
	echo "Some files are not well formatted:"
	echo "$modified_files"
	echo ""
	echo "The diff is:"
	git --no-pager diff
	exit 1
	fi

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