Bump GitHub Actions to v5 to resolve Node.js 20 deprecation #11

	name: Build, Test & Lint

	on: [push, pull_request]

	jobs:
	build-and-test:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v5
	- uses: actions/setup-go@v5
	with:
	go-version: '1.26'
	- name: Build
	run: make build
	- name: Test
	run: make test
	- name: Lint Go
	run: make lint-go
	- name: Check MDL example scripts
	run: \|
	FAILED=0
	for f in mdl-examples/doctype-tests/*.mdl; do
	[[ "$f" == *.test.mdl ]] && continue
	NAME=$(basename "$f")
	echo "::group::$NAME"
	if ./bin/mxcli check "$f"; then
	echo "PASS: $NAME"
	else
	echo "::error file=$f::Syntax check failed: $NAME"
	FAILED=1
	fi
	echo "::endgroup::"
	done
	exit $FAILED

Provide feedback