ci: add job to automate dependabot pre-checkin/vendor

Signed-off-by: Carlos Alexandro Becker <caarlos0@users.noreply.github.com>

Author: caarlos0

.github/workflows/dependabot-build.yml

@@ -0,0 +1,46 @@
+name: dependabot-build
+
+on:
+  pull_request:
+    paths:
+      - 'package.json'
+
+# https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#permissions
+permissions:
+  contents: write
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    if: github.actor == 'dependabot[bot]'
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          ref: ${{ github.head_ref }}
+      -
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@b5ca514318bd6ebac0fb2aedd5d36ec1b5c232a2 # v3.10.0
+      -
+        name: Vendor
+        uses: docker/bake-action@5be5f02ff8819ecd3092ea6b2e6261c31774f2b4 # v6.10.0
+        with:
+          targets: vendor
+      -
+        name: Pre-checkin
+        uses: docker/bake-action@5be5f02ff8819ecd3092ea6b2e6261c31774f2b4 # v6.10.0
+        with:
+          targets: pre-checkin
+      -
+        name: Commit and push changes
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
+          git add -A
+          if git diff --cached --quiet; then
+            echo "No changes to commit"
+          else
+            git commit -m "chore: update dist and vendor"
+            git push
+          fi