feat: bump to v4.1.0 and add CI/CD release pipeline

- Bump version to 4.1.0 in package.json and index.html
- Add build:local script for combined Linux + Windows local builds
- Add CI workflow: runs tests on push/PR to master
- Add Release workflow: tag-triggered (v*), parallel Linux + Windows
  builds, publishes all packages to GitHub Releases

Amit Haridas

.github/workflows/ci.yml

@@ -0,0 +1,25 @@
+name: CI
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+    branches: [master]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: npm
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Run tests
+        run: npm test