Add workflow to auto-build dist on Dependabot PRs

.github/workflows/dependabot-build.yml

@@ -0,0 +1,37 @@
+name: Dependabot Build
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened]
+
+permissions:
+  contents: write
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    if: github.actor == 'dependabot[bot]'
+    steps:
+      - name: Checkout PR branch
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ github.head_ref }}
+          token: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: "20"
+          cache: "npm"
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Build and test
+        run: npm run all
+
+      - name: Commit built dist
+        uses: stefanzweifel/git-auto-commit-action@v5
+        with:
+          commit_message: "Build dist for Dependabot update"
+          file_pattern: dist/