ci: Introduce `buildifier` style check #1

	---
	name: Run unit tests
	on:
	push:
	branches:
	- main
	pull_request:

	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}
	cancel-in-progress: true

	jobs:
	unit-test:
	runs-on: ubuntu-22.04
	steps:
	- name: Set up
	uses: ./.github/actions/setup.yml
	- name: Run unit tests
	run: ./execute_tests.bash

	style-check:
	runs-on: ubuntu-22.04
	steps:
	- name: Set up
	uses: ./.github/actions/setup.yml
	- name: Run formatters and linters
	run: ./style_check.bash
	- name: Fail if some files are changed
	run: \|
	if ! git diff --exit-code; then
	echo "ERROR: Files are changed by formatters" >&2
	exit 1
	fi

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