add shellcheck github actions workflow #8

	name: shell_check
	on:
	pull_request:
	paths:
	- '.github/workflows/shell_check.yml'
	- '**.sh'

	defaults:
	run:
	shell: bash

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

	jobs:
	shell_check:
	runs-on: ubuntu-latest
	timeout-minutes: 5
	permissions:
	contents: read
	pull-requests: write
	steps:
	- uses: actions/checkout@v4

	- name: shellcheck
	uses: reviewdog/action-shellcheck@v1
	with:
	github_token: ${{ secrets.github_token }}
	reporter: github-pr-review
	path: "."
	pattern: "*.sh"
	fail_level: "warning"
	check_all_files_with_shebangs: true

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