feat: add linter action for antlr #2

	name: ANTLR Grammar Lint

	on:
	push:
	paths:
	- '*/.g4'
	pull_request:
	paths:
	- '*/.g4'
	workflow_dispatch:

	jobs:
	lint-grammars:
	runs-on: ubuntu-latest

	strategy:
	matrix:
	include:
	- dialect: redshift
	path: redshift

	steps:
	- name: Checkout code
	uses: actions/checkout@v4

	- name: Set up Python
	uses: actions/setup-python@v5
	with:
	python-version: '3.x'

	- name: Install antlr-v4-linter
	run: \|
	pip install antlr4-python3-runtime
	pip install antlr-v4-linter

	- name: Lint ${{ matrix.dialect }} grammar files
	run: \|
	echo "Linting ANTLR grammar files for ${{ matrix.dialect }}"

	# Find all .g4 files in the dialect directory
	find ${{ matrix.path }} -name "*.g4" -type f \| while read -r file; do
	echo "Checking: $file"
	antlr-v4-linter "$file" \|\| exit_code=$?

	if [ "${exit_code:-0}" -ne 0 ]; then
	echo "::error file=$file::ANTLR grammar linting failed"
	exit 1
	fi
	done

	echo "✅ All grammar files for ${{ matrix.dialect }} passed linting"

	- name: Summary
	if: always()
	run: \|
	echo "## ANTLR Grammar Lint Results" >> $GITHUB_STEP_SUMMARY
	echo "Dialect: ${{ matrix.dialect }}" >> $GITHUB_STEP_SUMMARY
	echo "Path: \`${{ matrix.path }}\`" >> $GITHUB_STEP_SUMMARY
	echo "" >> $GITHUB_STEP_SUMMARY

	echo "### Files checked:" >> $GITHUB_STEP_SUMMARY
	find ${{ matrix.path }} -name "*.g4" -type f \| while read -r file; do
	echo "- \`$file\`" >> $GITHUB_STEP_SUMMARY
	done

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