Add linting workflow (#12) #2

	name: Lint Codebase

	on:
	pull_request:
	push:
	branches:
	- main

	jobs:
	lint:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v2

	- name: Check for .eslintrc.json
	id: check_eslint
	run: \|
	CONFIG_FILE=".eslintrc.json"

	if [ ! -f "$CONFIG_FILE" ]; then
	echo "ESLint configuration file ($CONFIG_FILE) not found."
	echo "found=false" >> $GITHUB_OUTPUT
	exit 0
	fi

	if ! jq empty "$CONFIG_FILE" > /dev/null 2>&1; then
	echo "ESLint configuration file ($CONFIG_FILE) is not valid JSON."
	echo "found=false" >> $GITHUB_OUTPUT
	exit 0
	fi

	if ! grep -q '"rules"' "$CONFIG_FILE"; then
	echo "ESLint rules not configured in $CONFIG_FILE."
	echo "found=false" >> $GITHUB_OUTPUT
	exit 0
	fi

	echo "found=true" >> $GITHUB_OUTPUT
	echo "ESLint configuration found and valid."

	- name: Run ESLint
	if: steps.check_eslint.outputs.found == 'true'
	run: npx eslint . --ext .js,.jsx,.ts,.tsx

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