Add GitHub Actions CI workflow and status badge

.github/workflows/ci.yml

@@ -0,0 +1,27 @@
+name: CI Tests
+
+on:
+  push:
+    branches: [ main ] # Or your default branch, e.g., master
+  pull_request:
+    branches: [ main ] # Or your default branch
+
+jobs:
+  test:
+    name: Run Tests
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v4
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20.x' # Specify a recent LTS Node.js version
+
+      - name: Make test script executable
+        run: chmod +x ./run_tests.sh
+
+      - name: Run test script
+        run: ./run_tests.sh

README.md

@@ -1,3 +1,5 @@
+[![CI Tests](https://github.com/martindb/sag_utils/actions/workflows/ci.yml/badge.svg)](https://github.com/martindb/sag_utils/actions/workflows/ci.yml)
+
 # SAG Utilities (sag_utils)
 
 A collection of Node.js command-line utilities for converting data files between a Software AG-style binary format (SAG) and plain text.