Adds scala steward action

Signed-off-by: Albert Pastrana <albert.pastrana@intenthq.com>

Author: albertpastrana

.github/workflows/scala-steward.yml

@@ -0,0 +1,14 @@
+on:
+  schedule:
+    - cron: '0 0 * * *'
+  workflow_dispatch:
+
+jobs:
+  scala-steward:
+    runs-on: ubuntu-latest
+    name: Launch Scala Steward
+    steps:
+      - name: Launch Scala Steward
+        uses: scala-steward-org/scala-steward-action@v2
+        with:
+          github-token: ${{ secrets.ADMIN_GITHUB_TOKEN }}