chore: add `check_code_format.yml` #6

	---
	name: check_code_format

	'on':
	workflow_dispatch:
	push:
	branches:
	- main
	pull_request:

	jobs:
	check_format_code:
	name: check format code
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4

	- name: Install fprettify
	run: pip install fprettify

	- name: Display fprettify version
	run: fprettify --version

	- name: Format code
	run: \|
	git clean -f -x -d
	fprettify --indent 4 --recursive .

	- name: Fail if needs reformatting
	run: \|
	if [[ $(git status --porcelain) ]]; then
	echo "please reformat/fprettify these files:"
	git status --porcelain=v1
	echo "exact diff:"
	fprettify --indent 4 --recursive --diff .
	exit 1
	fi
	...

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