ci (format): add auto-black formatter #258

	name: Test and Build Python Package

	on:
	push:
	branches:
	- main
	pull_request:

	jobs:
	build:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v4
	- name: Set up Python
	uses: actions/setup-python@v3
	with:
	python-version: '3.x'

	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install build flake8 black

	- name: Test - Code format
	run: \|
	black --check --diff --color pdf2zh/*.py
	flake8 --ignore E203,E261,E501,W503,E741

	- name: Test - Local installation
	run:
	python -m pip install -e .

	- name: Test - Translate a PDF file with plain text only
	run:
	pdf2zh ./test/file/translate.cli.plain.text.pdf

	- name: Test - Start GUI and exit
	run:
	timeout 10 pdf2zh -i \|\| code=$?; if [[ $code -ne 124 && $code -ne 0 ]]; then exit $code; fi

	- name: Build as a package
	run: python -m build

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