ci: add GitHub Actions workflow for publishing to npm

Author: Luis M Torres

.github/workflows/publish.yaml

@@ -0,0 +1,19 @@
+on:
+  push:
+    branches: main
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v3
+        with:
+          node-version: '20'
+      - run: npm ci
+      - run: npm run build
+      - uses: JS-DevTools/npm-publish@v3
+        with:
+          package: dist/ngx-bootstrap-components
+          access: public
+          token: ${{ secrets.NPM_TOKEN }}